EEC-IV 2 and 3 digit trouble codes. | Ford Explorer - Ford Ranger Forums - Serious Explorations

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EEC-IV 2 and 3 digit trouble codes.

BrooklynBay

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Here is a link to a list of 2, and 3 digit trouble codes, and troubleshooting information: HTTP://WWW.Troublecodes.Net/Ford

This thread has a link with information on pulling codes without a scanner: http://www.explorerforum.com/forums/showthread.php?t=202039. This is the direct link: http://www.fordfuelinjection.com/?p=13.

Here is a list of EEC-IV codes:
2 Digit Codes

11
System OK
12

Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too low) - ISC

13
(O)
ISC did not respond properly (extends to touch throttle then retracts for KOEO) - ISC

(R)
Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too high)

(M)
ISC sticking, open ITS circuit or TP sticking

14

Ignition pickup (PIP) was erratic - Ignition Systems

E4OD Transmission diesel RPM sensor - Diesel RPM sensor

15
(O)
No Keep Alive Memory power to PCM pin 1 or bad PCM (Memory Test Failure)

(M)
KAM (pin 1) was interrupted (was battery disconnected ?)

16

1.9L & 2.5L - Throttle stop set too high - IDLE or Idle Set Procedures

2.3L - RPM's too low - IDLE

(O)
Electronic ignition - IDM circuit fault - Ignition Systems

17

1.9L & 2.5L - Throttle stop set too low - IDLE

18
(R)
Check base timing & advance function - Timing Tests

(M)
Ignition TACH signal erratic - Ignition Systems

Spark Angle Word (SAW) circuit failure (1.9L SFI)

19
(O)
No Vehicle Power (pins 37 + 57) or bad PCM VPWR Diagnosis

(R)
Erratic idle during test (reset throttle & retest) - Idle Set Procedures

Electronic ignition Cylinder ID sensor/circuit problem - Ignition Systems

21

Engine Coolant Temperature (ECT) sensor out of range - ECT

22

MAP (vacuum) or BARO signal out of range - MAP

23

Throttle sensor out of range or throttle set too high - TPS

24

Intake Air Temperature (IAT) or Vane Air Temperature (VAT) sensor out of range - IAT VAT

25

Knock sensor not tested (ignore if not pinging) - KS

26

Mass Air Flow (MAF) or Vane Air Flow (VAF) out of range - MAF VAF

Transmission Oil Temperature (TOT) sensor out of range, Transmissions

27

Vehicle Speed Sensor problem - VSS

28

Vane Air Temperature (VAT) sensor out of range - VAT

2.3L w/Electronic Ignition - Cyl ID, IDM low or right coil pack failure - Ignition Systems

29

Vehicle Speed Sensor problem - VSS

31
(O,R,M)
EVP - EVP signal is/was out of range - EVP

(O,R,M)
EVR - EVP signal is/was low - EVR

(O,R,M)
PFE - PFE signal is/was low - PFE

32
(R)
EVP - EGR not responding properly during test - EVP

(O,R,M)
EVR - EVP signal is/was low - EVR

(R,M)
PFE - PFE shows low pressure, EGR not seating or memory, not seating intermittently - PFE

33
(O,M)
ALL - EGR did not open/ respond during test or if memory code, did not open intermittently - EVP EVR PFE

34
(R)
EVP - EGR did not respond properly during test - EVP

(O,R,M)
EVR - EVP sensor is/was high - EVR

(O,R,M)
PFE - PFE sensor is/was out of range - PFE

35
(R)
EVP - Engine RPM's too low to test EGR system - EVP

(O,R,M)
EVR - EVP sensor signal is/was high - EVR

(O,R,M)
PFE - PFE sensor signal is/was high - PFE

38

Idle Tracking Switch signal was intermittent - ISC

39

Transmission Torque Converter clutch not engaging - Transmissions

41
(R)
System lean - Fuel control

(M)
System was lean for 15 seconds or more (no HO2S switching) - Fuel control

42
(R)
System rich - Fuel control

(M)
System was rich for 15 seconds or more (no HO2S switching) - Fuel control

43
(R)
HO2S sensor not reading (run at 2000 rpm's for 2 minutes and retest - check for HO2S switching)

(M)
Was lean at WOT for 3 seconds or more - Fuel control

44

AIR system inoperative - Air Injection

45

AIR not Diverting (AIRD) - Air Injection

Electronic Ignition - coil primary circuit failure - Ignition Systems

46

AIR Bypass (AIRB) not working - Air Injection

Electronic Ignition - primary circuit failure coil 2 - Ignition Systems

47

Low flow unmetered air (check for small vacuum leaks, injector o'rings, gaskets etc )

E4OD transmission 4x4 switch/circuit problem - Transmissions

48

High flow unmetered air (check for large vacuum leak, inlet hoses etc. )

Electronic Ignition - coil primary circuit failure - Ignition Systems

49

Electronic Ignition - spout signal circuit problem - Ignition Systems

Transmission 1/2 shift problem - Transmissions

51

Engine Coolant Temperature (ECT) sensor signal is/was too high - ECT

52

Power Steering Pressure Switch/circuit open - PSP

(R)
Did you turn wheel during test ?

53

Throttle Position sensor too high - TPS

54

Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal high - IAT VAT

55

No or low (under 7.5 V) Key Power to PCM pin 5

56

Vane Air Flow (VAF) or Mass Air Flow (MAF) sensor high - VAF MAF

Transmission Oil Temperature sensor too high - Transmissions

57

Intermittent in Park/Neutral/ Switch or Neutral Pressure switch circuit - PNP or Transmissions

58

Idle Tracking Switch (ITS) signal problem ISC

Vane Air Temperature (VAT) sensor out of range or open - VAT

59

AXOD 4/3 circuit fault - Transmissions

3.0L SHO - Low speed fuel pump circuit problem - Power / Fuel Pump Circuits

Transmission 2/3 shift problem - Transmissions

61

Engine Coolant Temperature (ECT) sensor is or was too low - ECT

62

AXOD (KOEO only) 3/2 circuit short to ground - Transmissions

AXOD (KOEO AND KOER) 4/3 circuit failure - Transmissions

E4OD excessive converter clutch slippage - Transmissions

63

Throttle Position Sensor (TPS) signal too low TPS

64

Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal low or grounded - IAT VAT

65

Check intermittent HO2S (signal or ground) - Fuel Control

(R)
E4OD truck - cycle OD cancel switch after engine ID is received - Transmissions

1984 3.8L ONLY - O, M Battery voltage high (check for electrical system overcharging)

66

Vane Air Flow (VAF) or Mass Air Flow (MAF) signal low - VAF MAF

Transmission Oil Temperature (TOT) signal low (possibly grounded) - Transmissions

67

Park/Neutral circuit fault - PNP

Transmission Manual Lever Position (MLP) sensor circuit - Transmissions

(M)
Intermittent Park Neutral Position (PNP) sensor fault - PNP

68

Idle Tracking Switch (ITS) circuit (possibly grounded) - ISC

Vane Air Temperature (VAT) sensor out of range or grounded - VAT

3.8L AXOD -Transmission Temperature Switch (TTS) open - Transmissions

Electronic Transmission - Transmission Oil Temperature (TOT) sensor was overheated -Transmissions

69

AXOD transmission (O) 3/2 switch closed (possible short circuit) - Transmissions

AXOD (M) 3/2 switch open (poss short to power) - Transmissions

E4OD 3/4 shift problem - Transmissions

70
(M)
3.8L AXOD - Data link to instrument cluster fault Service any other EEC codes, erase memory and retest If code is still present refer to instrument cluster diagnosis manual

71
(M)
1.9L TBI, 2.3L TBI, 2.5L TBI - ITS signal was grounded when throttle should have been opening ITS-ISC ISC motor problem or Idle Tracking Switch (ITS) signal wire shorted to ground - ISC

(M)
1.9L MFI - PCM re-initialized Possible electrical noise, case ground or intermittent VPWR problem - VPWR Diagnosis

(M)
3.8L AXOD - Data link to instrument cluster fault - See code 70

72
(R)
No MAP or MAF change in "goose" test - retest, check for frequency or voltage change - MAP MAF

(M)
1.9L MFI - VPWR circuit to PCM was intermittent - VPWR Diagnosis

(M)
2.3L T/C - PCM re-initialized Possible electrical noise, case ground or intermittent VPWR problem - VPWR Diagnosis

(M)
3.8L AXOD - Message center data link circuit fault - See code 70

73
(O)
Rerun test, if 73 is still output replace TPS

(R)
No Throttle Position Sensor (TPS) change in "goose" test Must get at least 25% throttle rotation - TPS

74

Was brake depressed after engine ID was received ?

Brake On Off (BOO) signal open or short to ground - BOO

75

Brake On Off (BOO) signal shorted to power - BOO

76

Vane Air Flow (VAF) did not respond to "goose" test - VAF

77

System did not receive "goose" test - see TESTS

78
(M)
VPWR circuit to PCM was intermittent or the PCM is bad VPWR Diagnosis

79

A/C is on or pin 10 is shorted to power

81

Boost control solenoid - Solenoids

AIRD solenoid - Solenoids and Air Injection

3.0L SHO - Inlet Air Solenoid - Solenoids

82

2.3L TC - Fan Control wire shorted to ground - A/C and Fan Circuits

AIRB solenoid - Solenoids and Air Injection

3.8L SC - Super Charger Bypass Solenoid - Solenoids

83

High Electro Drive Fan circuit fault - A/C and Fan Circuits

EGR Control solenoid - Solenoids

3.0L SHO - Low Speed Fuel Pump Relay circuit - Power / Fuel Pump Circuits

84

EGR Vacuum Regulator - Solenoids

EGR cutoff solenoid - Solenoids

EGR Vent solenoid - Solenoids

85

2.3L T/C Automatic - 3/4-4/3 Shift solenoid - Transmissions

CANP solenoid (ALL 1989) - Solenoids

(M)
1.9L MFI - System has corrected rich condition - Fuel control

86

2.3L or 2.9L Truck - A4LD 3/4 shift solenoid - Transmissions

(M) 1.9L MFI - System has corrected lean condition - Fuel control

87
(O)
Fuel pump circuit fault (check inertia switch) - Power / Fuel Pump Circuits

Vehicles with 2 BBL carb - Temperature Compensated Accelerator Pump Solenoid - Solenoids (M) intermittent in fuel pump primary circuit - Power / Fuel Pump Circuits NOTE: On some Escorts with automatic seat belts this code is normal IN MEMORY due to the wiring

88

Throttle Kicker Solenoid - Solenoids

Variable Voltage Choke relay circuit fault - VVC

Fan Control circuit fault - A/C and Fan Circuits

A4LD - Converter Clutch Override solenoid - Transmissions

Electronic Ignition - IDM, DPI or spout circuit fault - Ignition Systems

89

A4LD - Converter Clutch Override solenoid - Transmissions

AXOD Torque Converter Control solenoid circuit - Transmissions

Exhaust Heat Control (heat riser) solenoid circuit - Solenoids

91
(R, M) System running lean - Fuel control

Transmission SS 1 circuit/solenoid problem - Transmissions

92
(R)
System running rich - Fuel control

Transmission SS 2 circuit/solenoid problem - Transmissions

93
(O,R)
Throttle linkage binding or bad ISC motor ISC HO2S not reading Fuel control

Transmission TCC circuit/solenoid problem - Transmissions

94

AIR system inoperative - Air Injection

Transmission TCC circuit/solenoid problem - Transmissions

95
(O)
Fuel pump: open, bad ground or always on - Power / Fuel Pump Circuits

(R)
AIR not Diverting (AIRD) - Air Injection

(M)
Possible bad fuel pump ground or open between fuel pump and pin 8 at PCM (Fuel Pump Monitor signal) - Power / Fuel Pump Circuits

96
(O)
Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits

(R)
AIR Bypass (AIRB) not working - Air Injection

(M)
(Service 87 code first if present) Fuel pump relay or battery power feed was open - Power / Fuel Pump Circuits

97

E4OD OD cancel light circuit failure - Transmissions

98
(R)
Did not pass KOEO yet (Get 11 in KOEO first)

Transmission EPC circuit/solenoid failure - Transmissions

99
(R)
ISC needs to learn (Let idle for 2 minutes, Erase memory and retest)

Transmission EPC circuit/solenoid failure - Transmissions

(R) = Engine Running test (M) = Memory code (O)=Key On Engine Off test

3 Digit codes

111

System checks OK

112
(O,M)
Intake Air Temperature (IAT) sensor is/was low or grounded - IAT

113
(O,M)
IAT sensor is/was high or open - IAT

114
(O,R)
IAT sensor out of range - IAT

116
(O,R)
Engine Coolant (ECT) sensor out of range - ECT

117
(O,M)
ECT sensor is/was low or grounded - ECT

118
(O,M)
ECT sensor is/was high or open - ECT

121
(O,R,M)
Throttle Position (TP) sensor out of range - TPS

122
(O,M)
TP low (possibly grounded or open circuit) - TPS

123
(O,M)
TP is/was high or short to power - TPS

124
(M)
TP voltage was higher than expected - Fuel control

125
(M)
TP voltage was lower than expected - Fuel control

126
(O,R,M)
MAP or BARO sensor out of range - ">MAP

128
(M)
MAP vacuum has not been changing - check vacuum lines - ">MAP

129
(R)
No MAP or Mass Air Flow sensor change during "goose" test - MAP MAF

136
(R)
Oxygen sensor not switching/system lean Left or Front HO2S - Fuel control

137
(R)
Oxygen sensor not switching/system rich Left or Front HO2S - Fuel control

138
(R)
Fault in Cold Start Injector circuit - Fuel control

139
(M)
Oxygen sensor not switching Left or Front HO2S - Fuel control

144
(M)
Oxygen sensor not switching Single, Right or Rear HO2S - Fuel control

157
(R,M)
Mass Air Flow signal is/was low or grounded - MAF

158
(O,R,M)
MAF sensor is/was high or short to power - MAF

159
(O,R)
MAF sensor is/was out of range - MAF

167
(R)
No Throttle Position sensor change in "goose" test (must get at least 25% rotation) - TPS

171
(M)
Oxygen sensor not switching - system was at adaptive limits - Single, Right or Rear HO2S - Fuel control

172
(R,M)
Oxygen sensor not switching - system is or was lean - Single, Right or Rear HO2S - Fuel control

173
(R,M)
Oxygen sensor not switching - system is or was rich - Single, Right or Rear HO2S - Fuel control

174
(M)
Oxygen sensor was slow in switching Single, Right or Rear HO2S - Fuel control

175
(M)
Oxygen sensor not switching - system was at adaptive limits - Left or Front HO2S - Fuel control

176
(M)
Oxygen sensor not switching - system is or was lean Left or Front HO2S - Fuel control

177
(M)
Oxygen sensor not switching - system was rich Left or Front HO2S - Fuel control

178
(M)
Oxygen sensor was slow in switching Left or Front HO2S - Fuel control

179
(M)
Fuel system was rich at part throttle Single, Right or Rear HO2S - Fuel control

181
(M)
Fuel system was lean at part throttle Single, Right or Rear HO2S - Fuel control

182
(M)
Fuel system was rich at idle Single, Right or Rear HO2S - Fuel control

183
(M)
Fuel system was lean at idle Single, Right or Rear HO2S - Fuel control

184
(M)
Mass Air (MAF) output higher than expected - Fuel control

185
(M)
Mass Air (MAF) output lower than expected - Fuel control

186
(M)
Injector pulse width longer than expected or Mass Air Flow (MAF) lower than expected - Fuel control

187

Injector pulse width shorter than expected or Mass Air Flow (MAF) higher than expected - Fuel control

188
(M)
Fuel system was rich at part throttle - Left or Front HO2S - Fuel control

189
(M)
Fuel system was lean at part throttle - Left or Front HO2S - Fuel control

191
(M)
Fuel system was rich at idle - Left or Front HO2S - Fuel control

192
(M)
Fuel system was lean at idle - Left or Front HO2S - Fuel control

193

Failure in Flexible Fuel (FF) sensor circuit - Fuel control

194
(M)
Perform cylinder balance test to check for inoperative injectors

195
(M)
Perform cylinder balance test to check for inoperative injectors

211
(M)
Ignition PIP signal was erratic or missing - Ignition Systems

212
(M)
Ignition TACH signal was erratic (module/wiring) or SPOUT circuit fault - Ignition Systems

213
(R)
Ignition SPOUT or SAW circuit open or shorted - Ignition Systems

214
(M)
Error in Cylinder ID (CID) circuit or signal - Ignition Systems

215
(M)
Primary circuit failure - ignition coil 1 - Ignition Systems

216
(M)
Primary circuit failure - ignition coil 2 - Ignition Systems

217
(M)
Primary circuit failure - ignition coil 3 - Ignition Systems

218
(M)
IDM signal open or high or left coil pack failure - Ignition Systems

219
(M)
SPOUT circuit failure, timing defaulted to 10 degrees - follow code 213 diagnosis

222
(M)
IDM open or high or right coil pack failure - Ignition Systems

223
(M)
Dual Plug (DPI), SPOUT or IDM circuit fault - Ignition Systems

224
(M)
Failure in ignition coil primary circuit - Ignition Systems

225
(R)
Knock sensor not tested (ignore if not pinging) - KS

226
(O)
Ignition Diagnostic Monitor (IDM) signal fault - Ignition Systems

232
(M)
EI primary coil circuit failure - Ignition Systems

238
(M)
EI primary circuit failure - ignition coil 4 - Ignition Systems

311
(R)
AIR system not working - Single, Right or Rear HO2S - Air Injection

312
(R)
AIR not diverting - Air Injection

313
(R)
AIR not bypassing - Air Injection

314
(R)
AIR inoperative, Left or Front HO2S - Air Injection

326
(R,M)
Pressure Feedback EGR shows low pressure EGR not seating or not seating intermittently - PFE

327
(O,R,M)
EGR feedback signal is/was low - EVR or PFE

328
(O,R,M)
EGR Valve Position (EVP) is/was low - EVR

332
(R,M)
EGR did not open/respond during test or if memory code, did not open intermittently - EVR or PFE

334
(O,R,M)
EVP sensor is/was high - EVR

335
(O)
EGR feedback signal is/was out of range - EVR or PFE

336
(O,R,M)
PFE sensor signal is/was was high - ">PFE

337
(O,R,M)
EGR feedback signal is/was was high - EVR

338
(M)
Cooling system did not heat up (check cooling system / thermostat operation)

339
(M)
Cooling system overheated (check cooling system / thermostat operation)

341
(O)
Octane jumper installed (information only code to notify you if it is installed)

411
(R)
Idle speed system not controlling idle properly (generally idle too high) - ISC

412
(R)
Idle speed system not controlling idle properly (generally idle too low) - ISC

452
(M)
Vehicle Speed Sensor (VSS) problem

511
(O)
No power to PCM pin 1 or bad PCM (processor)

512
(M)
Memory power (PCM pin 1) was interrupted - Was battery disconnected ?

513
(O)
Replace processor (PCM) (internal failure)

519
(O)
PSP switch/circuit open - PSP h Pedal Position (CPP) circuit fault - PNP

528
(M)
System shows voltage at pin 10 (is A/C on ?) or pin 30 (PNP, CPP switch) - PNP

529
(M)
Data Communications Link to processor failure Service any EEC codes, erase memory and retest If code is still present refer to instrument cluster diagnosis manual

533
(M)
Data Communications Link to instrument cluster failure - see 529

536
(O,R,M)
Brake On Off open or shorted to ground - BOO

538
(R)
System did not receive "goose" test - TESTS

539
(O)
System shows voltage at PCM pin 10 Is A/C on ?

542
(O,M)
Fuel pump open, bad ground or always on - - Power / Fuel Pump Circuits

543
(O)
Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits


(M)
(Service 556 code first if present) Fuel pump relay or battery power feed was open - Power / Fuel Pump Circuits

551

Problem in Intake Manifold Runner Control (IMRC) solenoid/circuit - Solenoids

552
(O)
AIRB solenoid/circuit failure - Solenoids

553
(O)
AIRD solenoid/circuit failure - Solenoids

554
(O)
Fuel Press Regulator Control solenoid/circuit fault - Power / Fuel Pump Circuits

556
(O,M)
Fuel pump relay primary circuit fault - Power / Fuel Pump Circuits

557
(O,M)
Low speed pump relay primary circuit fault - Power / Fuel Pump Circuits

558
(O)
EGR vacuum regulator solenoid/circuit failure - EVR or PFE or Solenoids

559
(O)
A/C relay primary circuit fault - A/C and Fan Circuits

563
(O)
High Fan Control (HFC) circuit failure - A/C and Fan Circuits

564
(O)
Fan Control (FC) circuit failure - A/C and Fan Circuits

565
(O)
Canister Purge 1 solenoid/circuit failure - Solenoids

566
(O)
transmission 3/4 shift solenoid/circuit - Transmissions

569
(O)
Canister Purge 2 solenoid/circuit failure - Solenoids

578
(M)
A/C pressure sensor VREF short to ground - A/C and Fan Circuits

579
(M)
ACP sensor did not change with A/C on - A/C and Fan Circuits

581
(M)
Cooling fan current was excessive - A/C and Fan Circuits

582
(O)
Open cooling fan circuit - A/C and Fan Circuits

583
(M)
Fuel pump current was excessive - Power / Fuel Pump Circuits

584
(M)
Open power ground circuit - Power / Fuel Pump Circuits

585
(M)
A/C clutch current was excessive - A/C and Fan Circuits

586
(M)
Open circuit in A/C clutch - A/C and Fan Circuits

587
(O, M)
Communication problem between PCM and Variable Control Relay Module (VCRM) - Power / Fuel Pump Circuits

617
(M)
Transmission shift failure (1/2 shift) - Transmissions

618
(M)
Transmission shift failure (2/3 shift) - Transmissions

619
(M)
Transmission shift failure (3/4 shift) - Transmissions

621
(O)
Solenoid/circuit failure - shift solenoid 1 - Transmissions

622
(O)
Solenoid/circuit failure - shift solenoid 2 - Transmissions

624
(O,M)
Solenoid/circuit failure -Electronic Pressure Control (EPC) current is high - Transmissions

625
(O,M)
Solenoid/circuit failure - Electronic Pressure Control (EPC) current is low - Transmissions

626
(O)
Transmission Coast Clutch (CCS) Solenoid/circuit fault - Transmissions

627
(O)
Torque Converter Clutch circuit fault - Transmissions

628
(M)
Excessive converter clutch slippage - Transmissions

629
(O,M)
Torque Converter Clutch circuit fault - Transmissions

631
(O)
Overdrive Cancel Light circuit problem - Transmissions

632
(R)
E4OD - Transmission Control Switch (TCS) should be cycled once between engine ID and Goose test

633
(O)
4x4L switch should be in 4x2 or 4x4 high for the test

634
(O,M)
Park/Neutral Position (PNP) or Clutch Pedal Position (CPP) circuit fault Electronic shift transmission - Manual Lever Position (MLP) sensor out of range in Park-Transmissions

636
(O,R)
Transmission Oil Temperature (TOT) sensor out of range - Transmissions

637
(O,M)
TOT sensor is/was high or open - Transmissions

638
(O,M)
TOT sensor is/was low or grounded - Transmissions

639
(R,M)
Transmission Speed sensor (TSS) circuit fault - Transmissions

641
(O)
Transmission solenoid/circuit failure Shift Solenoid 3 - Transmissions

643
(O,M)
Torque Converter Clutch (TCC) circuit - Transmissions

645
(M)
Transmission 1st gear failure - Transmissions

646
(M)
Transmission 2nd gear failure - Transmissions

647
(M)
Transmission 3rd gear failure - Transmissions

648
(M)
Transmission 4th gear failure - Transmissions

649
(M)
Transmission EPC system failure - Transmissions

651
(M)
Transmission EPC solenoid/circuit fault - Transmissions

652
(O)
Torque Converter Clutch (TCC) circuit fault - Transmissions

654
(O)
Transmission selector not in PARK - Transmissions

656
(M)
Torque Converter Clutch (TCC) slip - Transmissions

657
(M)
Transmission temperature was excessive - Transmissions

96 & newer vehicles are OBD2 systems
and REQUIRE A SCANNER, unless otherwise stated.
Warning: Please check for manufacturer specific codes and
confirm the trouble code descriptions with an appropriate manual.
Disclaimer: We cannot guarantee the accuracy of all information.
Please confirm the information with an appropriate manual.

This was the more complete list from the second link:
EEC-IV

C—Continuous memory code.
O—Key On, engine Off self test code.
R—Engine running self test code.

MIL

Type

11
System Pass
C/O/R

12
RPM Not Within Self Test Upper Limit
R

13
RPM Not Within Self Test Lower Limit
R

DC Motor Did Not Move
C/O/R

14
Profile Ignition Pickup Circuit Failure
C

Engine RPM Sensor Circuit Fault (Diesel)
C

15
Readout Memory Test Failed
O

Keep Alive Memory Test Failed
C

16
Ignition Diagnostic Module (2.9L, 3.0L & 4.0L)
O

Idle RPM High With ISC Retracted (2.5L)
R

RPM Above Self Test Limit With ISC Off (1986–90 1.9L EFI)
R

RPM Too Low To Perform HO2S Test (Others)
R

17
Idle RPM Low With ISC Retracted (1.9L & 2.5L CFI)
R

RPM Below Self Test Limit With ISC Off (1986–90 1.9L EFI)
R

18
Spark Out (SPOUT) Circuit Open
R

Loss Of Ignition Diagnostic Module Input To PCM/SPOUT Circuit Grounded
C

Spark Angle Word (SAW) Circuit Failure (1.9L SFI)
C/R

19
Failure In PCM Internal Voltage
R

Erratic RPM During Hard Idle Self Test
R

RPM Drop Too Low During ISC Off Test (1.9L EFI)
R

Power Processor Check (2.3L HSC EFI)
O

Cylinder Identification Sensor Input Failure (3.0L SHO)
C

21
Engine Coolant Temperature (ECT) Sensor Out Of Self Test Range
O/R

22
Manifold Absolute Pressure/Barometric Pressure Sensor Out Of Self Test Range
C/O/R

23
Throttle Position Sensor Out Of Self Test Range
C/O/R

Fuel Injector Pump Lever Sensor Input Is Out Of Self Test Range (Diesel)
O/R

24
Intake Air Temperature/Air Charge Temperature Sensor Out Of Self Test Range
O/R

25
Knock Not Sensed During Dynamic Response Test
R

26
Mass Air Flow/Vane Air Flow Sensor Out Of Self Test Range
O/R

Transmission Fluid Temperature Sensor Input Out Of Self Test Range (5.0L, 5.8L, 7.3L & 7.5L Truck)
O/R

27
Vehicle Speed Sensor (2.3L Turbo)
C

28
Loss Of Ignition Diagnostic Module RH Side
C

Vane Air Temperature Sensor Input Out Of Self Test Range (1.9L EFI)
O/R

29
Insufficient Input From Programmable Speedometer/Odometer Module (From 1993)
C

Insufficient Input From Vehicle Speed Sensor (To 1992)
C

31
EGR Valve Position/Pressure Feedback EGR Circuit Below Minimum Voltage
C/O/R

32
EGR Not Controlling (2.3L OHC & 3.8L CFI)
R

EGR Valve Not Seated (1.9L CFI, 2.9L & 3.0L SHO)
C/R

EGR Valve Position/Pressure Feedback EGR Voltage Below Closed Voltage (Others)
C/O/R

33
EGR Not Closing Properly (2.3L OHC & 3.8L CFI)
C/R

Throttle Position Sensor Noisy/Harsh On Line (Diesel)
C

EGR Valve Opening Not Detected (Others)
C/R

34
EGR Valve Opening Not Detected (2.3L OHC & 3.8L CFI)
R

Defective EGR Pressure Transducer Sensor (1.9L CFI, 2.3L HSC EFI & 3.0L)
C/O/R

EGR On/Off Control (2.3L Turbo)
R

EGR Valve Position/Pressure Feedback EGR Voltage Above Closed Limit (Others)
C/O/R

35
RPM Too Low To Perform EGR Test (2.3L OHC & 3.8L CFI)
R

EGR Valve Position/EGR Pressure Feedback EGR Circuit Above Maximum Voltage (Others)
C/O/R

36
System Indicates Lean At Idle
R

37
System Indicates Rich At Idle
R

38
DC Motor Idle Speed Control/Idle Tracking Throttle Position Sensor Open Circuit (2.3L CFI & 2.5L HSC)
C

39
AXOD Converter Bypass Clutch Not Applying Properly
C

41
System Indicates Lean
R

No HO2S Switching Detected
C

42
System Indicates Rich
R

No O2S Switching Detected
C

43
HO2S Lean At Wide Open Throttle (1986–90 1.9L MFI)
C

Throttle Position Sensor Below Idle Sped (Diesel)
C

44
Secondary Air System Inoperative
R

45
Secondary Air Upstream During Self Test
R

Coil 1 Primary Circuit Failure (1990–91 1.9L EFI/SFI, )
C

Distributorless Ignition System Coil Pack 3 Circuit Failure (3.0L SHO 3.8L SC)
C

46
Secondary Air Not Bypassed During Self Test
R

Coil 2 Primary Circuit Failure (1990–91 1.9L MFI/SFI)
C

Distributorless Ignition System Coil Pack 1 Circuit Failure (3.0L SHO 3.8L SC)
C

47
4 X 4 Switch Is Closed
O

Measured Air Flow Low At Base Idle
R

48
Loss Of Ignition Diagnostic Monitor LH Side (2.3L)
C

Measured Air Flow High At Base Idle (1986–90 1.9L EFI)
R

Distributorless Ignition System Coil Pack 2 Circuit Failure (3.0L SHO 3.8L SC)
C

49
Spark Output (SPOUT) Signal Default To 10°. BDTC (3.0L SHO & 3.8L SC)
C

1–2 Shift Error (Others)
C

51
Engine Coolant Temperature Circuit Open
O/C

52
Power Steering Pressure Switch Circuit Open
O

Power Steering Pressure Switch Circuit Did Not Change States
R

53
Throttle Position Sensor Circuit Above Maximum Voltage
C/O

Fuel Injector Pump Lever Sensor Input Is Greater Than Self Test (Diesel)
C/O

54
Intake Air Temperature/Air Charge Temperature Circuit Open
C/O/R

55
Key Power Check
R

56
Transmission Fluid Temperature Circuit Open
C/O

Mass Air Flow/Vane Air Flow Sensor Circuit Above Maximum Voltage
C/O/R

57
Transaxle Neutral Position Switch Circuit Failed Open
C

58
Idle Tracking Switch Circuit Open Or Grounded (CFI)
O/R

Vane Air Temperature Sensor Input Greater Than Self Test Maximum (EFI)
C/O

59
AXOD Neutral Position Switch Circuit Failed Open (3.0L & 3.8L)
C

2–3 Shift Error (Others)
C

Low Speed Fuel Pump Circuit Failure, Battery To PCM (3.0L SHO)
C/O

AXOD 4/3 Pressure Switch Circuit Failed Closed
O

AXOD 4/3 Pressure Switch Circuit Failed Open
C

61
ECT Sensor Circuit Grounded
C/O/R

62
Torque Converter Clutch Error
C

AXOD 4/3 Or 3/2 Pressure Switch Circuit Grounded
O

63
Throttle Position Sensor Circuit Below Minimum Voltage
C/O/R

Fuel Injection Pump Lever Sensor Input Is Less Than Self Test Min. (Diesel)
C/O

64
Intake Air Temperature/Air Charge Temperature Circuit Grounded
C/O/R

65
Transmission Control Switch/Overdrive Cancel Switch Circuit Did Not Change States
R

Fuel Control (2.3L Turbo)
C

66
Mass Air Flow Sensor Circuit Below Minimum Voltage (Except 1.9L MFI & 2.3L Turbo)
C

Vane Air Flow Sensor Input Less Than Self Test Minimum (1.9L MFI & 2.3L Turbo)
O/C

Transmission Fluid Temperature Circuit Grounded (Others)
O/C

67
Park Neutral Position Switch Circuit Open; A/C On (Manual)
O

Manual Lever Position Sensor Out Of Range/A/C On
O/C

Clutch Switch Circuit Failure
C

A/C Input High (2.5L TBI)
O/C

68
Idle Tracking Switch Closed (1.9L, 2.3L, 2.5L & 3.8L CFI)
O/R

Vane Air Temperature Sensor Input Less Than Self Test Minimum (1.9L MFI & 2.3L Turbo)
O/C

Transmission Fluid Temperature Transmission Over Temp (Overheated) (Diesel)
C

69
3–4 Shift Error
C

AXOD Neutral Position Switch Failed Open (3.0L)
C

AXOD 3/2 Pressure Switch Failed Closed (3.8L SFI)
C/O

70
EEC IV Data Transaxle Circuit Failed (3.8L SFI)
C

71
Idle Tracking Switch Closed On Pre-Position (1.9L, 2.3L & 2.5L CFI)
C

Software Re-Initalization Detected (1.9L EFI)
C

Cluster Center Control Circuit Failed (3.8L SFI)
C

72
Insufficient Manifold Absolute Pressure/Mass Air Flow Change During Dynamic Response Test
R

Power Interrupt Software Re-Initalization Detected (1.9L & 2.3L Turbo)
C

Message Center Control Assembly Circuit Failed (3.8L SFI)
C

73
Insufficient Throttle Position Change During Dynamic Response Test
O/R

74
Brake On/Off Circuit Open–Not During Self Test
R/C

75
rake On/Off Circuit Closed/ECA Input Open
R

76
Insufficient Vane Air Flow Sensor Output Change During Dynamic Response Test
R

77
Operator Error Dynamic Response Test
R

78
Re-Initalization Check
R

79
A/C On/Defrost On During Self Test
O

81
Secondary Air Diverter Circuit Failure
O

Turbo Boost (2.3L Turbo)
O

Insufficient IAS Output Voltage Change When Solenoid Is Activated (3.0L SHO)
O

82
Secondary Air Bypass Circuit Failure
O

Integrated Relay Control Module (2.3L Turbo)
O

Supercharger Bypass Circuit Failure (3.8L SC)
O

83
Integrated Relay Control Module (2.3L Turbo & 2.5L)
O

High Electric Drive Fan Circuit Failure (1.9L & 2.5L SFI)
O

EVP/EGRC/EGRV (2.3L OHC & 3.8L CFI)
O

Low Speed Fuel Pump Relay Circuit Open (3.0L SHO)
C/O

Integrated Relay Control Module (3.8L Turbo)
O

High Electric Drive Fan Circuit Failure (3.8L SFI & 3.8L SC)
O

84
EGR Valve Position/Pressure Feedback EGR/EGR Control Circuit Failure
O

85
Adaptive Fuel Lean Limit Reached (1.9L EFI)
C

Shift Solenoid 3/4–4/3 (2.3L Turbo)
O

CANP Circuit Failure (Others)
O

86
Shift Solenoid Circuit Failure (2.9L 3.0L & 4.0L)
O

Adaptive Fuel Rich Limit Reached (1.9L EFI)
C

87
Primary Fuel Pump Circuit Failure
O/C

Integrated Relay Control Module (2.3L Turbo & 2.5L & 3.8L MFI)
O

88
Loss Of Dual Plug Input Control
C

Shift Solenoid 3/4–4/3 (2.3 Turbo)
O

Integrated Relay Control Module (2.5 L HSC & 3.8L EFI)
O

Electric Drive Fan Circuit Failure (2.5L, 3.0L SHO & 3.8L SFI)
O

Throttle Kicker Fault (5.0L)

89
Converter Clutch Override Circuit Failure (2.9L, 3.0L & 4.0L)
O

Exhaust Heat Control (3.8L CFI)
O

91
Shift Solenoid 1 Circuit Failure
O

HO2S Circuit Indicates Lean
R

No HO2S Switching Detected
C

92
Shift Solenoid 2 Circuit Failure
O

HO2S Circuit Indicates Rich
R

93
Throttle Position Sensor Input Low At Maximum D.C. Motor Extension (1.9L, 2.3L & 2.5L TBI)
O

Converter Clutch Solenoid Circuit Failure (Others)
O

94
Torque Converter Clutch Solenoid Circuit Failure
O

Secondary Air Injection Inoperative
R

95
Integrated Relay Control Module (2.5L HSC & 3.8L EFI)
C/O

Fuel Pump Circuit Open-PCM To Motor Ground (Others)
C/O

96
Integrated Relay Control Module (2.5L HSC & 3.8L EFI)
C/O

High Speed Fuel Pump Relay Circuit Open (3.0L SHO)
C/O

Fuel Pump Circuit Open-Battery To PCM (Others)
C/O

97
Transmission Control Indicator Lamp Circuit Failure
O

98
Hard Fault Present
R

Electronic Pressure Control Driver Open In PCM (Diesel)
O

99
Electronic Pressure Control Circuit Failure
O/C

Electronic Engine System Has Not Learned To Control Idle
R

111
System Pass
C/O/R

112
Intake Air Temperature/Air Charge Temperature Sensor Circuit Below Minimum Voltage
C/O

113
Intake Air Temperature/Air Charge Temperature Sensor Circuit Above Maximum Voltage
C/O

114
Intake Air Temperature/Air Charge Temperature Higher Or Lower Than Expected
O/R

116
Engine Coolant Temperature Higher Or Lower Than Expected
O/R

117
ECT Sensor Circuit Below Minimum Voltage
C/O

118
ECT Sensor Circuit Above Maximum Voltage
C/O

121
Closed Throttle Voltage Higher Or Lower Than Expected
C/O/R

121
Indicates Throttle Position Voltage Inconsistent With Mass Air Flow Sensor
C/O/R

122
Throttle Position Sensor Circuit Below Minimum Voltage
C/O

123
Throttle Position Sensor Circuit Above Maximum Voltage
C/O

124
Throttle Position Sensor Voltage Higher Than Expected
C

125
Throttle Position Sensor Voltage Lower Than Expected
C

126
Manifold Absolute Pressure/Barometric Pressure Sensor Higher Or Lower Than Expected
C/O/R

Cylinder Identification Circuit Failure (3.0L SHO)
C

128
Manifold Absolute Pressure Sensor Vacuum Hose Damaged/Disconnected
C

129
Insufficient Manifold Absolute Pressure/Mass Air Flow Change During Dynamic Response Test KOER
R

136
System Indicates Lean (Bank No. 1)
R

137
System Indicates Rich (Bank No. 2)
R

138
Cold Start Injector Flow Insufficient
R

139
No HO2S Switch Detected
C

141
Flexible Fuel Control
R

144
No HO2S Switch Detected
C

157
Mass Air Flows Sensor Circuit Below Minimum Voltage
C

158
Mass Air Flow Sensor Circuit Above Maximum Voltage
C/O

159
Mass Air Flow Higher Or Lower Than Expected
O/R

167
Insufficient Throttle Position Change During Dynamic Response Test
R

171
Fuel System At Adaptive Limits
C

No HO2S Switching Detected
C

172
HO2S System Indicates Lean
C/R

173
HO2S System Indicates Rich
R

174
HO2S Switching Time Is Slow
C

175
Fuel System At Adaptive Limits (Bank No. 2)
C

176
System Indicates Lean (Bank No. 2)
C

Insufficient TP Change During Dynamic Response Test (4.9L)
R

177
System Indicates Rich (Bank No. 2)
C

178
HO2S Switch Time Is Slow (Bank No. 1)
C

179
Fuel System At Lean Adaptive Limit At Part Throttle, System Rich (1.9L, 2.0L. 2.3L HSC, 2.5L & 3.0L)
C

Fuel System Adaptive Lean Limit Is Reached (4.6L, 4.9L 5.0L, 5.8L, 7.0L & 7.5L)
C

Fuel System At Rich Adaptive Limit (Others)
C

181
Fuel System At Rich Adaptive Limit At Part Throttle, System Lean (1.9L, 2.0L, 2.3L HSC, 2.5L & 3.0L)
C

Fuel System Adaptive Rich Limit Is Reached (4.6L, 4.9L, 5.0L, 5.8L , 7.0L & 7.5L)
C

Fuel System At Lean Adaptive Limit (Others)
C

182
Fuel System At Lean Adaptive Limit At Idle, System Rich (1.9L, 2.3L, 2.5L, 3.0L, 3.8L SC, 4.6L , 7.0L & 7.5L)
C

Fuel System At Lean Adaptive Limit (Others)
C

183
Fuel System At Rich Adaptive Limit At Idle, System Lean (1.9L, 2.3L, 3.0L, 3.8L SC, 4.6L, 7.0L & 7.5L)
C

Fuel System At Rich Adaptive Limit (Others)
C

184
Mass Air Flow Sensor Circuit Voltage Higher Than Expected
C

185
Mass Air Flow Sensor Circuit Voltage Lower Than Expected
C

186
Injector Pulse Width Higher Than Expected (With BARO Sensor)
C

Injector Pulse Width Higher Or Mass Air Flow Lower Than Expected (Less BARO Sensor)
C

187
Injector Pulse Width Lower Than Expected (With BARO Sensor)
C

Injector Pulse Width Lower Or MAF Higher Than Expected (Less BARO Sensor)
C

188
Fuel System At Lean Adaptive Limit
C

189
Fuel System At Rich Adaptive Limit
C

191
Fuel System At Lean Adaptive Limit (Front)
C

192
Fuel System At Rich Adaptive Limit (Front)

193
Flexible Fuel Sensor Circuit Failure
O

211
Profile Ignition Pickup Circuit Failure
C

212
Loss Of Ignition Diagnostic Module Input To PCM/SPOUT Circuit Grounded
C

213
Spark Output (SPOUT) Circuit Open
R

214
Cylinder Identification Circuit Failure
C

215
PCM Detected Coil 1 Primary Circuit Failure (EI)
C

216
PCM Detected Coil 2 Primary Circuit Failure (EI)
C

217
PCM Detected Coil 3 Primary Circuit Failure (EI)
C

218
Loss Of Ignition Diagnostic Module Signal LH Side (Dual Plug EI)
C

219
Spark Timing Error
C

221
Spark Timing Error
C

222
Loss Of Ignition Diagnostic Module Signal RH Side (Dual Plug EI)
C

223
Loss Of Dual Plug Ignition Control (Dual Plug EI)
C

224
PCM Detected Coil 1, 2, 3 Or 4 Primary Circuit Failure (EI)
C

Erratic Ignition Diagnostic Module Input To Processor
C

Loss Of Tack Input To Processor/SPOUT Circuit Grounded (5.8L)
C

225
Knock Not Sensed During Dynamic Response Test KOER
R

226
Ignition Diagnostic Module Signal Not Received (EI)
O

232
PCM Detected Coil 1, 2, 3 Or 4 Primary Circuit Failure (EI)
C

238
PCM Detect Coil 4 Primary Circuit Failure
C

244
Cylinder Identification Sensor Circuit Failure (2.0L)
R

311
AIR System Inoperative/AIR System Inoperative During KOER (Bank No. 1 With Dual HO2S)
R

312
AIR Misdirected During KOER
R

313
AIR Not Bypassed During KOER
R

314
AIR System Inoperative During KOER
R

326
EGR Temperature Sensor Circuit Above Maximum Voltage (2.0L, 2.3L HSC & 3.0L SHO)
C

Pressure Feedback EGR Circuit Voltage Low (Others)
C/R

327
EGR Circuit Below Minimum Voltage
C/O/R

328
EGR Valve Position Sensor Closed Valve Voltage Lower Than Expected
C/O/R

332
Insufficient EGR Flow Detected
C/R

334
EGR Valve Position Sensor Closed Valve Voltage Higher Than Expected
C/O/R

335
Pressure Feedback EGR Sensor Voltage Higher Or Lower Than Expected During KOEO
O

336
Pressure Feedback EGR Circuit Voltage Higher Than Expected
C/R

337
EGR Valve Position/Pressure Feedback EGR Circuit Above Maximum Voltage
C/O/R

338
Engine Coolant Temperature Lower Than Expected
C

339
Engine Coolant Temperature Higher Than Expected
C

341
Octane Adjust Service Pin Open
O

381
Erratic A/C Compressor Clutch Cycling
C

411
Cannot Control RPM During KOER Low RPM Check
R

412
Cannot Control RPM During KOER High RPM Check
R

415
Idle Air Control Solenoid
C

416
Idle Air Control Solenoid
C

452
Insufficient Input From Vehicle Speed Sensor To PCM
C

511
Read Out Memory Test Failure KOEO
C/O/R

512
Keep Alive Memory Test Failure
C

513
PCM Internal Voltage Failure (KOEO)
C/O/R

519
Power Steering Pressure Switch Circuit Open KOEO
O

521
Power Steering Pressure Switch Circuit Did Not Change States KOER
R

522
Vehicle Not In Park Or Neutral During KOEO
O

524
Low Speed Fuel Pump Circuit Open
C/O

525
Vehicle In Gear With A/C On
C/O

526
Neutral Position Switch Circuit Closed, A/C On
O

527
Neutral Drive Switch Circuit Open, A/C On
O

528
Clutch Position Switch Circuit Failure
C

529
Data Communication Link Or Electronic Engine Controller Fault
C

533
Data Communication Link To Electronic Instrument Cluster Fault
C

536
Brake On/Off Circuit Failure/Not Actuated During KOER
C/R

538
Insufficient RPM Change During KOER Dynamic Response Test
R

538
Invalid Cylinder Balance Test Due To Throttle Movement During Test
R

538
Invalid Cylinder Balance Test Due To Cylinder Identification Sensor Circuit Failure
R

539
A/C On/Defrost On During KOEO
O/R

542
Fuel Pump Circuit Open–PCM To Motor Ground
C/O

543
Fuel Pump Circuit Open–Battery To Powertrain Control Module (PCM)
C/O

551
Intake Air Control Circuit Failure KOEO
O

552
AIR Bypass Circuit Failure KOEO
O

553
AIR Bypass Circuit Failure KOEO
O

554
Fuel Pump Relay Control Circuit Failure
O

556
Fuel Pump Relay Primary Circuit Failure
C/O

557
Low Speed Fuel Pump Primary Circuit Failure
C/O

558
EGR Vacuum Regulator Circuit Failure
O

559
A/C On Relay Circuit Failure
O

563
High Speed Electric Fan Circuit Failure
O

564
Electric Fan Circuit Failure
O

565
Canister Purge Circuit Failure KOEO
O

566
Shift Solenoid Circuit Failure KOEO
O

569
Auxiliary Canister Purge Circuit Failure
O

571
EGR Circuit Failure
O

572
EGR Circuit Failure
O

578
A/C Pressure Sensor Circuit
C

579
Insufficient A/C Pressure Change
C

581
Power To Fan Circuit Over Current
C

582
Fan Circuit Open
O

583
Power To Fuel Pump Over Current
C

584
Power Ground Circuit Open
C

585
Power To A/C Clutch Over Current
C

586
A/C Clutch Circuit Open
C

587
Vehicle Control Relay Module Communication Failure
C/O

617
1–2 Shift Error
C

618
2–3 Shift Error
C

619
3–4 Shift Error
C

621
Shift Solenoid 1 Circuit Failure KOEO
C/O

622
Shift Solenoid 2 Circuit Failure KOEO
C/O

623
Transmission Control Indicator Lamp Circuit Failure
C/O

624
Electronic Pressure Control Circuit Failure
C/O

625
Hard Fault Is Present (5.8L)
C/O/R

625
Electronic Pressure Control Driver Open In PCM (Others)
C/.O

626
Converter Clutch Solenoid Circuit Failure KOEO
O

627
Torque Converter Clutch Solenoid Circuit Failure
O

628
Excessive Torque Converter Clutch Slippage
C

629
Torque Converter Clutch Solenoid Circuit Failure
C

631
Transmission Control Indicator Lamp Circuit Failure KOEO
O

632
Torque Converter Solenoid Circuit Did Not Change States During KOER
C

633
4 X 4 Switch Closed During KOEO
O

634
Manual Lever Position Sensor Voltage Higher Or Lower Than Expected
C/O

636
Transmission Fluid Temperature Higher Or Lower Than Expected
O/R

637
Transmission Fluid Temperature Sensor Circuit Above Maximum Voltage
C/O

638
Transmission Fluid Temperature Sensor Circuit Below Minimum Voltage
C/O

639
Insufficient Input From Turbine Speed Sensor
C/R

641
Shift Solenoid 3 Circuit Failure
C/O

643
Torque Converter Clutch Circuit Failure
C/O

645
Improper Gear Ratio In 1st Gear
C

646
Improper Gear Ratio In 2nd Gear
C

647
Improper Gear Ratio In 3rd Gear
C

648
Improper Gear Ratio In 4th Gear
C

649
Electronic Pressure Control Higher Or Lower Than Expected
C

651
Electronic Pressure Control Circuit Failure
C

652
Torque Converter Clutch Solenoid Circuit Failure
C

653
Torque Converter Solenoid Did Not Change States During KOER
R

654
Manual Lever Position Sensor Indicating Not In Park During Self Test
O

655
Manual Lever Position Sensor Indicating Not In Neutral During Self Test


656
Torque Converter Clutch Slippage Error
C

657
Transmission Over Temp Condition
C

659
High Vehicle Speed In Park Indicated
R

662
Shift Solenoid 2 Circuit
O

667
Transmission Range Sensor Circuit Below Minimum Voltage
C/O

668
Transmission Range Sensor Circuit Above Maximum Voltage
C/O

675
Transmission Range Sensor Circuit Voltage Out Of Range
O/R

998
Hard Fault Present
O/R

96 & newer vehicles are OBD2 systems
and REQUIRE A SCANNER, unless otherwise stated.
Warning: Please check for manufacturer specific codes and
confirm the trouble code descriptions with an appropriate manual.
Disclaimer: We cannot guarantee the accuracy of all information.
Please confirm the information with an appropriate manual.
We try and make them as accurate as we can, but sometimes we all make mistakes.
 


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BrooklynBay

Moderator & long time member.
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City, State
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Year, Model & Trim Level
88 89 93 95 96 Aerostars
http://www.thorssell.net/hbook/2digit.html has a list of 2 digit codes:

EEC IV 2 DIGIT CODES
[EEC Tests]

NOTE: When you see "is/was" listed for a code:
For a HARD fault code the sensor IS out of range right now.
For a MEMORY code, it WAS out of range at one time (possible intermittent wire etc.).

Some codes pertain to more than one system but there will be only one of the systems on the vehicle.
For example code 58. A vehicle with a VAT sensor will not have an Idle Tracking Switch.

Differences in test mode noted as:

(O) = Key On Engine Off test
(R) = Key On Engine Running test
(M) = Memory code

11 System checks OK -

12 Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too low)

13 (O) ISC did not respond properly (extends to touch throttle then retracts for KOEO)
(R) Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too high)
(M) ISC sticking, open ITS circuit or TP sticking

14 Ignition pickup was erratic
E4OD Transmission diesel RPM sensor

15 (O) No Keep Alive Memory power to PCM pin 1 or bad PCM (Memory Test Failure)
(M) KAM (pin 1) was interrupted (was battery disconnected ?)

16 1.9L & 2.5L - Throttle stop set too high
2.3L - RPM's too low
(O) Electronic ignition - IDM circuit fault

17 1.9L & 2.5L - Throttle stop set too low

18 (R) Check base timing & advance function
(M) Ignition TACH signal erratic

19 (O) No Vehicle Power (pins 37 + 57) or bad PCM
(R) Erratic idle during test (reset throttle & retest)
Electronic ignition Cylinder ID sensor/circuit problem

21 Engine Coolant Temperature (ECT) sensor out of range

22 MAP (vacuum) or BARO signal out of range

23 Throttle sensor out of range or throttle set too high

24 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) sensor out of range

25 Knock sensor not tested (ignore if not pinging)

26 Mass Air Flow (MAF) or Vane Air Flow (VAF) out of range
Transmission Oil Temperature (TOT) sensor out of range

27 Vehicle Speed Sensor problem

28 Vane Air Temperature (VAT) sensor out of range
2.3L w/Electronic Ignition - Cyl ID, IDM low or right coil pack failure

29 Vehicle Speed Sensor problem

EGR CODES DEPEND ON WHAT SYSTEM TYPE THE VEHICLE IS EQUIPPED WITH:

EVP is for vehicles equipped with EGR solenoid(s), with or without an EVP sensor

EVR is for vehicles equipped with an EGR Vacuum Regulator (EVR) and an EGR Valve Position (EVP) sensor

PFE is for vehicles with Pressure Feedback EGR (PFE) sensor and and an EGR Vacuum Regulator (EVR)

If you don't know what type of system you have, go to the EVP heading, which is the first one.
There are pictures under the different headings to help you identify the system.

31 EVP - (O, R, M) EVP signal is/was out of range
EVR - (O, R, M) EVP signal is/was low
PFE - (O, R, M) PFE signal is/was low

32 EVP - (R) EGR not responding properly during test
EVR - (O, R, M) EVP signal is/was low
PFE - (R, M) PFE shows low pressure, EGR not seating or memory, not seating intermittently

33 ALL - (O, M) EGR did not open/ respond during test or if memory code, did not open intermittently

34 EVP - (R) EGR did not respond properly during test EVR - (O, R, M) EVP sensor is/was high PFE - (O, R, M) PFE sensor is/was out of range

35 EVP - (R) Engine RPM's too low to test EGR system
EVR - (O, R, M) EVP sensor signal is/was high
PFE - (O, R, M) PFE sensor signal is/was high

38 Idle Tracking Switch signal was intermittent

39 Transmission Torque Converter clutch not engaging

40 SERIES FUEL/AIR INJECTION CODES ON VEHICLES WITH DUAL OXYGEN SENSORS REFER TO THE RIGHT OR REAR SENSOR. EXCEPT: 1984-1988 3.8L ENGINES: LEFT SENSOR

41 (R) System lean
(M) System was lean for 15 seconds or more (no HO2S switching)

42 (R) System rich
(M) System was rich for 15 seconds or more (no HO2S switching)

43 (R) HO2S sensor not reading (run at 2000 rpm's for 2 minutes and retest - check for HO2S switching)
(M) Was lean at WOT for 3 seconds or more

44 AIR system inoperative

45 AIR not Diverting (AIRD)
Electronic Ignition - coil primary circuit failure

46 AIR Bypass (AIRB) not working
Electronic Ignition - primary circuit failure coil 2

47 Low flow unmetered air (check for small vacuum leaks, injector o'rings, gaskets etc.)
E4OD transmission 4x4 switch/circuit problem

48 High flow unmetered air (check for large vacuum leak, inlet hoses etc.)
Electronic Ignition - coil primary circuit failure

49 Electronic Ignition - spout signal circuit problem
Transmission 1/2 shift problem

51 Engine Coolant Temperature (ECT) sensor signal is/was too high

52 Power Steering Pressure Switch/circuit open
(R) Did you turn wheel during test ?

53 Throttle Position sensor too high

54 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal high

55 No or low (under 7.5 V) Key Power to PCM pin 5

56 Vane Air Flow (VAF) or Mass Air Flow (MAF) sensor high
Transmission Oil Temperature sensor too high

57 Intermittent in Park/Neutral/ Switch or Neutral Pressure switch circuit
1990 Scorpio - Octane jumper installed (information only code - to inform you if it is installed or not)

58 Idle Tracking Switch (ITS) signal problem
Vane Air Temperature (VAT) sensor out of range or open

59 AXOD 4/3 circuit fault
3.0L SHO - Low speed fuel pump circuit problem
Transmission 2/3 shift problem
1990 Scorpio - Idle jumper installed (information only code - to inform you if it is installed or not)

61 Engine Coolant Temperature (ECT) sensor is or was too low

62 AXOD (KOEO only) 3/2 circuit short to ground
AXOD (KOEO AND KOER) 4/3 circuit failure
E4OD excessive converter clutch slippage

63 Throttle Position Sensor (TPS) signal too low

64 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal low or grounded

65 Check intermittent HO2S (signal or ground)
(R) E4OD truck - cycle OD cancel switch after engine ID is received
1984 3.8L ONLY - O, M Battery voltage high (check for electrical system overcharging)

66 Vane Air Flow (VAF) or Mass Air Flow (MAF) signal low
Transmission Oil Temperature (TOT) signal low (possibly grounded)

67 Park/Neutral circuit fault
Transmission Manual Lever Position (MLP) sensor circuit
(M) Intermittent Park Neutral Position (PNP) sensor fault

68 Idle Tracking Switch (ITS) circuit (possibly grounded)
Vane Air Temperature (VAT) sensor out of range or grounded
3.8L AXOD -Transmission Temperature Switch (TTS) open
Electronic Transmission - Transmission Oil Temperature (TOT) sensor was overheated

69 AXOD transmission (O) 3/2 switch closed (possible short circuit)
AXOD (M) 3/2 switch open (poss short to power)
E4OD 3/4 shift problem

70 (M) 3.8L AXOD - Data link to instrument cluster fault. Service any other EEC codes, erase memory and retest.
If code is still present refer to instrument cluster diagnosis manual.

71 (M) 1.9L TBI, 2.3L TBI, 2.5L TBI - ITS signal was grounded when throttle should have been opening ITS
ISC motor problem or Idle Tracking Switch (ITS) signal wire shorted to ground
(M) 1.9L MFI - PCM re-initialized. Possible electrical noise, case ground or intermittent VPWR problem
(M) 3.8L AXOD - Data link to instrument cluster fault - See code 70

72 (R) No MAP or MAF change in "goose" test - retest, check for frequency or voltage change
(M) 1.9L MFI - VPWR circuit to PCM was intermittent
(M) 2.3L T/C - PCM re-initialized. Possible electrical noise, case ground or intermittent VPWR problem
(M) 3.8L AXOD - Message center data link circuit fault - See code 70

73 (O) Rerun test, if 73 is still output replace TPS
(R) No Throttle Position Sensor (TPS) change in "goose" test. Must get at least 25% throttle rotation

74 Was brake depressed after engine ID was received ?
Brake On Off (BOO) signal open or short to ground

75 Brake On Off (BOO) signal shorted to power

76 Vane Air Flow (VAF) did not respond to "goose" test

77 System did not receive "goose" test - see TESTS

78 (M) VPWR circuit to PCM was intermittent or the PCM is bad

79 A/C is on or pin 10 is shorted to power

80 SERIES CODES GENERALLY ARE CIRCUIT PROBLEMS THAT COULD BE WIRING, RELAY OR SOLENOID RELATED.
ONLY ONE OF THE CIRCUITS LISTED UNDER THE CODE IS USED ON EACH VEHICLE. THE FAULT IS IN WHICHEVER SOLENOID OR CIRCUIT IS PRESENT ON THE VEHICLE

81 Boost control solenoid
AIRD solenoid
3.0L SHO - Inlet Air Solenoid

82 2.3L TC - Fan Control wire shorted to ground
AIRB solenoid
3.8L SC - Super Charger Bypass Solenoid

83 High Electro Drive Fan circuit fault
EGR Control solenoid
3.0L SHO - Low Speed Fuel Pump Relay circuit

84 EGR Vacuum Regulator
EGR cutoff solenoid
EGR Vent solenoid

85 2.3L T/C Automatic - 3/4-4/3 Shift solenoid
CANP solenoid (ALL 1989)
(M) 1.9L MFI - System has corrected rich condition

86 2.3L or 2.9L Truck - A4LD 3/4 shift solenoid
(M) 1.9L MFI - System has corrected lean condition

87 (O) Fuel pump circuit fault (check inertia switch)
Vehicles with 2BBL carb - Temperature Compensated Accelerator Pump Solenoid
(M) intermittent in fuel pump primary circuit
NOTE: On some Escorts with automatic seat belts this code is normal IN MEMORY due to the wiring

88 Throttle Kicker Solenoid
Variable Voltage Choke relay circuit fault
Fan Control circuit fault
A4LD - Converter Clutch Override solenoid
Electronic Ignition - IDM, DPI or spout circuit fault

89 A4LD - Converter Clutch Override solenoid
AXOD Torque Converter Control solenoid circuit
Exhaust Heat Control (heat riser) solenoid circuit

90 SERIES FUEL/AIR INJECTION CODES ON VEHICLES WITH DUAL OXYGEN SENSORS REFER TO THE LEFT OR FRONT SENSOR. EXCEPT: 1984-1988 3.8L ENGINES: RIGHT SENSOR

91 (R, M) System running lean
Transmission SS 1 circuit/solenoid problem

92 (R) System running rich
Transmission SS 2 circuit/solenoid problem

93 (O) Throttle linkage binding or bad ISC motor (R) HO2S not reading
Transmission TCC circuit/solenoid problem

94 AIR system inoperative
Transmission TCC circuit/solenoid problem

95 (O) Fuel pump: open, bad ground or always on
(R) AIR not Diverting (AIRD)
(M) Possible bad fuel pump ground or open between fuel pump and pin 8 at PCM (Fuel Pump Monitor signal)

96 (O) Fuel pump monitor circuit shows no power
(R) AIR Bypass (AIRB) not working
(M) (Service 87 code first if present) Fuel pump relay or battery power feed was open

97 E4OD OD cancel light circuit failure

98 (R) Did not pass KOEO yet (Get 11 in KOEO first)
Transmission EPC circuit/solenoid failure

99 (R) ISC needs to learn (Let idle for 2 minutes; Erase memory and retest)
Transmission EPC circuit/solenoid failure
[EEC Tests]

http://www.thorssell.net/hbook/3digit.html has a list of 3 digit codes:

EEC IV 3 DIGIT CODES
[EEC Tests]

Applicable only to some 1991 and up vehicles

NOTE: When you see "is/was" listed for a code:
For a HARD fault code the sensor IS out of range right now.
For a MEMORY code, it WAS out of range at one time (possible intermittent wire etc.).

Differences in test mode noted as:

(O) =Key On Engine Off test
(R) =Key On Engine Running test
(M) =Memory code

111 System checks OK

112 (O,M) Intake Air Temperature (IAT) sensor is/was low or grounded

113 (O,M) IAT sensor is/was high or open

114 (O,R) IAT sensor out of range

116 (O,R) Engine Coolant (ECT) sensor out of range

117 (O,M) ECT sensor is/was low or grounded

118 (O,M) ECT sensor is/was high or open

121 (O,R,M) Throttle Position (TP) sensor out of range

122 (O,M) TP low (possibly grounded or open circuit)

123 (O,M) TP is/was high or short to power

124 (M) TP voltage was higher than expected

125 (M) TP voltage was lower than expected

126 (O,R,M) MAP or BARO sensor out of range

128 (M) MAP vacuum has not been changing - check vacuum lines

129 (R) No MAP or Mass Air Flow sensor change during "goose" test

136 (R) Oxygen sensor not switching/system lean Left or Front HO2S

137 (R) Oxygen sensor not switching/system rich Left or Front HO2S

138 (R) Fault in Cold Start Injector circuit

139 (M) Oxygen sensor not switching Left or Front HO2S

144 (M) Oxygen sensor not switching Single, Right or Rear HO2S

157 (R,M) Mass Air Flow signal is/was low or grounded

158 (O,R,M) MAF sensor is/was high or short to power

159 (O,R) MAF sensor is/was out of range

167 (R) No Throttle Position sensor change in "goose" test (must get at least 25% rotation)

171 (M) Oxygen sensor not switching - system was at adaptive limits - Single, Right or Rear HO2S

172 (R,M) Oxygen sensor not switching - system is or was lean - Single, Right or Rear HO2S

173 (R,M) Oxygen sensor not switching - system is or was rich - Single, Right or Rear HO2S

174 (M) Oxygen sensor was slow in switching Single, Right or Rear HO2S

175 (M) Oxygen sensor not switching - system was at adaptive limits - Left or Front HO2S

176 (M) Oxygen sensor not switching - system is or was lean Left or Front HO2S

177 (M) Oxygen sensor not switching - system was rich Left or Front HO2S

178 (M) Oxygen sensor was slow in switching Left or Front HO2S

179 (M) Fuel system was rich at part throttle Single, Right or Rear HO2S

181 (M) Fuel system was lean at part throttle Single, Right or Rear HO2S

182 (M) Fuel system was rich at idle Single, Right or Rear HO2S

183 (M) Fuel system was lean at idle Single, Right or Rear HO2S

184 (M) Mass Air (MAF) output higher than expected

185 (M) Mass Air (MAF) output lower than expected

186 (M) Injector pulse width longer than expected or Mass Air Flow (MAF) lower than expected

187 Injector pulse width shorter than expected or Mass Air Flow (MAF) higher than expected

188 (M) Fuel system was rich at part throttle - Left or Front HO2S

189 (M) Fuel system was lean at part throttle - Left or Front HO2S

191 (M) Fuel system was rich at idle - Left or Front HO2S

192 (M) Fuel system was lean at idle - Left or Front HO2S

193 Failure in Flexible Fuel (FF) sensor circuit

194 (M) Perform cylinder balance test to check for inoperative injectors

195 (M) Perform cylinder balance test to check for inoperative injectors

211 (M) Ignition PIP signal was erratic or missing

212 (M) Ignition TACH signal was erratic (module/wiring) or SPOUT circuit fault

213 (R) Ignition SPOUT or SAW circuit open or shorted

214 (M) Error in Cylinder ID (CID) circuit or signal

215 (M) Primary circuit failure - ignition coil 1

216 (M) Primary circuit failure - ignition coil 2

217 (M) Primary circuit failure - ignition coil 3

218 (M) IDM signal open or high or left coil pack failure

219 (M) SPOUT circuit failure, timing defaulted to 10 degrees - follow code 213 diagnosis

222 (M) IDM open or high or right coil pack failure

223 (M) Dual Plug (DPI), SPOUT or IDM circuit fault

224 (M) Failure in ignition coil primary circuit

225 (R) Knock sensor not tested (ignore if not pinging)

226 (O) Ignition Diagnostic Monitor (IDM) signal fault

232 (M) EI primary coil circuit failure

238 (M) EI primary circuit failure - ignition coil 4

311 (R) AIR system not working - Single, Right or Rear HO2S

312 (R) AIR not diverting

313 (R) AIR not bypassing

314 (R) AIR inoperative, Left or Front HO2S

326 (R,M) Pressure Feedback EGR shows low pressure EGR not seating or not seating intermittently

327 (O,R,M) EGR feedback signal is/was low

328 (O,R,M) EGR Valve Position (EVP) is/was low

332 (R,M) EGR did not open/respond during test or if memory code, did not open intermittently

334 (O,R,M) EVP sensor is/was high

335 (O) EGR feedback signal is/was out of range

336 (O,R,M) PFE sensor signal is/was high

337 (O,R,M) EGR feedback signal is/was high

338 (M) Cooling system did not heat up (check cooling system / thermostat operation)

339 (M) Cooling system overheated (check cooling system / thermostat operation)

341 (O) Octane jumper installed (information only code to notify you if it is installed)

411 (R) Idle speed system not controlling idle properly (generally idle too high)

412 (R) Idle speed system not controlling idle properly (generally idle too low)

452 (M) Vehicle Speed Sensor (VSS) problem

511 (O) No power to PCM pin 1 or bad PCM (processor)

512 (M) Memory power (PCM pin 1) was interrupted - Was battery disconnected ?

513 (O) Replace processor (PCM) (internal failure)

519 (O) PSP switch/circuit open

521 (R) Wheel not turned during test or PSP problem

522 (O) Park/Neutral Position (PNP) or Clutch Pedal Position (CPP) circuit fault Transmission MLP sensor out of range in park

524 Problem in low speed fuel pump circuit

525 (O,M) Park/Neutral Position (PNP) or Clutch Pedal Position (CPP) circuit fault

528 (M) System shows voltage at pin 10 (is A/C on ?) or pin 30 (PNP, CPP switch)

529 (M) Data Communications Link to processor failure
Service any EEC codes, erase memory and retest. If code is still present refer to instrument cluster diagnosis manual.

533 (M) Data Communications Link to instrument cluster failure - see 529

536 (O,R,M) Brake On Off open or shorted to ground

538 (R) System did not receive "goose" test - TESTS

539 (O) System shows voltage at PCM pin 10. Is A/C on ?

542 (O,M) Fuel pump open, bad ground or always on -

543 (O) Fuel pump monitor circuit shows no power (M) (Service 556 code first if present) Fuel pump relay or battery power feed was open

551 Problem in Intake Manifold Runner Control (IMRC) solenoid/circuit

552 (O) AIRB solenoid/circuit failure

553 (O) AIRD solenoid/circuit failure

554 (O) Fuel Press Regulator Control solenoid/circuit fault

556 (O,M) Fuel pump relay primary circuit fault

557 (O,M) Low speed pump relay primary circuit fault

558 (O) EGR vacuum regulator solenoid/circuit failure

559 (O) A/C relay primary circuit fault

563 (O) High Fan Control (HFC) circuit failure

564 (O) Fan Control (FC) circuit failure

565 (O) Canister Purge 1 solenoid/circuit failure

566 (O) transmission 3/4 shift solenoid/circuit

569 (O) Canister Purge 2 solenoid/circuit failure

578 (M) A/C pressure sensor VREF short to ground

579 (M) ACP sensor did not change with A/C on

581 (M) Cooling fan current was excessive

582 (O) Open cooling fan circuit

583 (M) Fuel pump current was excessive

584 (M) Open power ground circuit

585 (M) A/C clutch current was excessive

586 (M) Open circuit in A/C clutch

587 (O, M) Communication problem between PCM and Variable Control Relay Module (VCRM)

617 (M) Transmission shift failure (1/2 shift)

618 (M) Transmission shift failure (2/3 shift)

619 (M) Transmission shift failure (3/4 shift)

621 (O) Solenoid/circuit failure - shift solenoid 1

622 (O) Solenoid/circuit failure - shift solenoid 2

624 (O,M) Solenoid/circuit failure -Electronic Pressure Control (EPC) current is high

625 (O,M) Solenoid/circuit failure - Electronic Pressure Control (EPC) current is low

626 (O) Transmission Coast Clutch (CCS) Solenoid/circuit fault

627 (O) Torque Converter Clutch circuit fault

628 (M) Excessive converter clutch slippage

629 (O,M) Torque Converter Clutch circuit fault

631 (O) Overdrive Cancel Light circuit problem

632 (R) E4OD - Transmission Control Switch (TCS) should be cycled once between engine ID and Goose test

633 (O) 4x4L switch should be in 4x2 or 4x4 high for the test

634 (O,M) Park/Neutral Position (PNP) or Clutch Pedal Position (CPP) circuit fault
Electronic shift transmission - Manual Lever Position (MLP) sensor out of range in PARK

636 (O,R) Transmission Oil Temperature (TOT) sensor out of range

637 (O,M) TOT sensor is/was high or open

638 (O,M) TOT sensor is/was low or grounded

639 (R,M) Transmission Speed sensor (TSS) circuit fault

641 (O) Transmission solenoid/circuit failure Shift Solenoid 3

643 (O)(M) Torque Converter Clutch (TCC) circuit

645 (M) Transmission 1st gear failure

646 (M) Transmission 2nd gear failure

647 (M) Transmission 3rd gear failure

648 (M) Transmission 4th gear failure

649 (M) Transmission EPC system failure

651 (M) Transmission EPC solenoid/circuit fault

652 (O) Torque Converter Clutch (TCC) circuit fault

654 (O) Transmission selector not in PARK

656 (M) Torque Converter Clutch (TCC) slip

657 (M) Transmission temperature was excessive

998 (R) Did not pass Key On Engine Off test yet (Get 111 in KOEO first)
(O) Transmission Electronic Pressure Control (EPC) solenoid/circuit fault [EEC Tests]
 




BrooklynBay

Moderator & long time member.
Staff member
Moderator
Elite Explorer
Joined
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Messages
55,125
Reaction score
693
City, State
Brooklyn, NY
Year, Model & Trim Level
88 89 93 95 96 Aerostars
http://www.thorssell.net/hbook/eectest.html has an excellent article on how to perform an EEC-IV self test.

Electronic Engine Control self test for Ford vehicles with EEC IV
WARNING!
FOLLOW STANDARD SAFETY PRACTICES WHEN WORKING ON A VEHICLE INCLUDING BUT NOT LIMITED TO:
Transmission in Park or Neutral and the driven wheels off the ground or chocked when cranking/running the engine.
Check fan blade for cracks and do not stand next to the fan when engine is running.
Use caution when working on fuel systems, which can remain pressurized for a long period after the key is turned off.
No smoking around fuel.
Watch for electric fan which can come on at any time.
Watch out for hot and/or moving parts.
When working on a no-start vehicle, use a neon spark tester to check for spark and ground the coil wire to prevent accidental starting if spark should occur while testing.
Watch out for high voltage secondary circuits.
If you are not sure of the safety of any operation DO NOT DO IT. ASK SOMEONE!

CODE TYPES AND FORMATS.

Codes are output as a series of pulses. The following charts show the (approximate) timing of the various code pulses.

NOTE: Two digit codes are shown. Three digit codes have similar timing. It just takes a little practice to distinguish between two and three digit types.
codes2.gif


--------------------------------------------------------------------------------


TESTS
NOTE: Vehicle should be fully warmed for all tests.

HOOKUP

See figure below. EEC IV vehicles have two connectors for self testing the system. They are located on the firewall or the left or right front fender. The large connector contains the self test output (STO) and ground (SIG RTN). The small pigtail is the self test input (STI).
4hup96.gif
 




BrooklynBay

Moderator & long time member.
Staff member
Moderator
Elite Explorer
Joined
November 11, 2005
Messages
55,125
Reaction score
693
City, State
Brooklyn, NY
Year, Model & Trim Level
88 89 93 95 96 Aerostars
WWW.TheRangerStation.Com has a list of 2 digit codes in this link: http://www.therangerstation.com/tech_library/2digitcodes.html

2-Digit Codes (All Fords)

Differences in test mode noted as:
(O) = Key On Engine Off test
(R) = Key On Engine Running test
(M) = Memory code

Code Definition:

11
System checks OK
12
Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too low) - ISC
13 (O) ISC did not respond properly (extends to touch throttle then retracts for KOEO) - ISC
(R) Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too high)
(M) ISC sticking, open ITS circuit or TP sticking
14 Ignition pickup was erratic - Ignition Systems
E4OD Transmission diesel RPM sensor - Diesel RPM sensor
15 (O) No Keep Alive Memory power to PCM pin 1 or bad PCM (Memory Test Failure)
(M) KAM (pin 1) was interrupted (was battery disconnected ?)
16 1.9L & 2.5L - Throttle stop set too high - IDLE or Idle Set Procedures
2.3L - RPM's too low - IDLE
(O) Electronic ignition - IDM circuit fault - Ignition Systems
17 1.9L & 2.5L - Throttle stop set too low - IDLE
18 (R) Check base timing & advance function - Timing Tests
(M) Ignition TACH signal erratic - Ignition Systems
19 (O) No Vehicle Power (pins 37 + 57) or bad PCM VPWR Diagnosis
(R) Erratic idle during test (reset throttle & retest) - Idle Set Procedures
Electronic ignition Cylinder ID sensor/circuit problem - Ignition Systems
21 Engine Coolant Temperature (ECT) sensor out of range - ECT
22 MAP (vacuum) or BARO signal out of range - MAP
23 Throttle sensor out of range or throttle set too high - TPS
24 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) sensor out of range - IAT VAT
25 Knock sensor not tested (ignore if not pinging) - KS
26 Mass Air Flow (MAF) or Vane Air Flow (VAF) out of range - MAF VAF
Transmission Oil Temperature (TOT) sensor out of range - Transmissions
27 Vehicle Speed Sensor problem - VSS
28 Vane Air Temperature (VAT) sensor out of range - VAT
2.3L w/Electronic Ignition - Cyl ID, IDM low or right coil pack failure - Ignition Systems
29 Vehicle Speed Sensor problem - VSS
EGR CODES DEPEND ON WHAT SYSTEM TYPE THE VEHICLE IS EQUIPPED WITH:
EVP is for vehicles equipped with EGR solenoid(s), with or without an EVP sensor
EVR is for vehicles equipped with an EGR Vacuum Regulator (EVR) and an EGR Valve Position (EVP) sensor
PFE is for vehicles with Pressure Feedback EGR (PFE) sensor and and an EGR Vacuum Regulator (EVR)
If you don't know what type of system you have, go to the EVP heading, which is the first one.
There are pictures under the different headings to help you identify the system.
31 EVP - (O, R, M) EVP signal is/was out of range - EVP
EVR - (O, R, M) EVP signal is/was low - EVR
PFE - (O, R, M) PFE signal is/was low - PFE
32 EVP - (R) EGR not responding properly during test - EVP
EVR - (O, R, M) EVP signal is/was low - EVR
PFE - (R, M) PFE shows low pressure, EGR not seating or memory, not seating intermittently - PFE
33 ALL - (O, M) EGR did not open/ respond during test or if memory code, did not open intermittently - EVP EVR PFE
34 EVP - (R) EGR did not respond properly during test - EVP
EVR - (O, R, M) EVP sensor is/was high - EVR
PFE - (O, R, M) PFE sensor is/was out of range - PFE
35 EVP - (R) Engine RPM's too low to test EGR system - EVP
EVR - (O, R, M) EVP sensor signal is/was high - EVR
PFE - (O, R, M) PFE sensor signal is/was high - PFE
38 Idle Tracking Switch signal was intermittent - ISC
39 Transmission Torque Converter clutch not engaging - Transmissions
40 SERIES FUEL/AIR INJECTION CODES ON VEHICLES WITH DUAL OXYGEN SENSORS REFER TO THE RIGHT OR REAR SENSOR. EXCEPT: 1984-1988 3.8L ENGINES: LEFT SENSOR
41 (R) System lean - Fuel control
(M) System was lean for 15 seconds or more (no HO2S switching) - Fuel control
42 (R) System rich - Fuel control
(M) System was rich for 15 seconds or more (no HO2S switching) - Fuel control
43 (R) HO2S sensor not reading (run at 2000 rpm's for 2 minutes and retest - check for HO2S switching)
(M) Was lean at WOT for 3 seconds or more - Fuel control
44 AIR system inoperative - Air Injection
45 AIR not Diverting (AIRD) - Air Injection
Electronic Ignition - coil primary circuit failure - Ignition Systems
46 AIR Bypass (AIRB) not working - Air Injection
Electronic Ignition - primary circuit failure coil 2 - Ignition Systems
47 Low flow unmetered air (check for small vacuum leaks, injector o'rings, gaskets etc.)
E4OD transmission 4x4 switch/circuit problem - Transmissions
48 High flow unmetered air (check for large vacuum leak, inlet hoses etc.)
Electronic Ignition - coil primary circuit failure - Ignition Systems
49 Electronic Ignition - spout signal circuit problem - Ignition Systems
Transmission 1/2 shift problem - Transmissions
51 Engine Coolant Temperature (ECT) sensor signal is/was too high - ECT
52 Power Steering Pressure Switch/circuit open - PSP
(R) Did you turn wheel during test ?
53 Throttle Position sensor too high - TPS
54 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal high - IAT VAT
55 No or low (under 7.5 V) Key Power to PCM pin 5
56 Vane Air Flow (VAF) or Mass Air Flow (MAF) sensor high - VAF MAF
Transmission Oil Temperature sensor too high - Transmissions
57 Intermittent in Park/Neutral/ Switch or Neutral Pressure switch circuit - PNP or Transmissions
1990 Scorpio - Octane jumper installed (information only code - to inform you if it is installed or not)
58 Idle Tracking Switch (ITS) signal problem ISC
Vane Air Temperature (VAT) sensor out of range or open - VAT
59 AXOD 4/3 circuit fault - Transmissions
3.0L SHO - Low speed fuel pump circuit problem - Power / Fuel Pump Circuits
Transmission 2/3 shift problem - Transmissions
1990 Scorpio - Idle jumper installed (information only code - to inform you if it is installed or not)
61 Engine Coolant Temperature (ECT) sensor is or was too low - ECT
62 AXOD (KOEO only) 3/2 circuit short to ground - Transmissions
AXOD (KOEO AND KOER) 4/3 circuit failure - Transmissions
E4OD excessive converter clutch slippage - Transmissions
63 Throttle Position Sensor (TPS) signal too low TPS
64 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal low or grounded - IAT VAT
65 Check intermittent HO2S (signal or ground) - Fuel Control
(R) E4OD truck - cycle OD cancel switch after engine ID is received - Transmissions
1984 3.8L ONLY - O, M Battery voltage high (check for electrical system overcharging)
66 Vane Air Flow (VAF) or Mass Air Flow (MAF) signal low - VAF MAF
Transmission Oil Temperature (TOT) signal low (possibly grounded) - Transmissions
67 Park/Neutral circuit fault - PNP
Transmission Manual Lever Position (MLP) sensor circuit - Transmissions
(M) Intermittent Park Neutral Position (PNP) sensor fault - PNP
68 Idle Tracking Switch (ITS) circuit (possibly grounded) - ISC
Vane Air Temperature (VAT) sensor out of range or grounded - VAT
3.8L AXOD -Transmission Temperature Switch (TTS) open - Transmissions
Electronic Transmission - Transmission Oil Temperature (TOT) sensor was overheated - Transmissions
69 AXOD transmission (O) 3/2 switch closed (possible short circuit) - Transmissions
AXOD (M) 3/2 switch open (poss short to power) - Transmissions
E4OD 3/4 shift problem - Transmissions
70 (M) 3.8L AXOD - Data link to instrument cluster fault. Service any other EEC codes, erase memory and retest.
If code is still present refer to instrument cluster diagnosis manual.
71 (M) 1.9L TBI, 2.3L TBI, 2.5L TBI - ITS signal was grounded when throttle should have been opening ITS - ISC
ISC motor problem or Idle Tracking Switch (ITS) signal wire shorted to ground - ISC
(M) 1.9L MFI - PCM re-initialized. Possible electrical noise, case ground or intermittent VPWR problem - VPWR Diagnosis
(M) 3.8L AXOD - Data link to instrument cluster fault - See code 70
72 (R) No MAP or MAF change in "goose" test - retest, check for frequency or voltage change - MAP MAF
(M) 1.9L MFI - VPWR circuit to PCM was intermittent - VPWR Diagnosis
(M) 2.3L T/C - PCM re-initialized. Possible electrical noise, case ground or intermittent VPWR problem - VPWR Diagnosis
(M) 3.8L AXOD - Message center data link circuit fault - See code 70
73 (O) Rerun test, if 73 is still output replace TPS
(R) No Throttle Position Sensor (TPS) change in "goose" test. Must get at least 25% throttle rotation - TPS
74 Was brake depressed after engine ID was received ?
Brake On Off (BOO) signal open or short to ground - BOO
75 Brake On Off (BOO) signal shorted to power - BOO
76 Vane Air Flow (VAF) did not respond to "goose" test - VAF
77 System did not receive "goose" test - see TESTS
78 (M) VPWR circuit to PCM was intermittent or the PCM is bad VPWR Diagnosis
79 A/C is on or pin 10 is shorted to power
80 SERIES CODES GENERALLY ARE CIRCUIT PROBLEMS THAT COULD BE WIRING, RELAY OR SOLENOID RELATED.
ONLY ONE OF THE CIRCUITS LISTED UNDER THE CODE IS USED ON EACH VEHICLE. THE FAULT IS IN WHICHEVER SOLENOID OR CIRCUIT IS PRESENT ON THE VEHICLE
81 Boost control solenoid - Solenoids
AIRD solenoid - Solenoids and Air Injection
3.0L SHO - Inlet Air Solenoid - Solenoids
82 2.3L TC - Fan Control wire shorted to ground - A/C and Fan Circuits
AIRB solenoid - Solenoids and Air Injection
3.8L SC - Super Charger Bypass Solenoid - Solenoids
83 High Electro Drive Fan circuit fault - A/C and Fan Circuits
EGR Control solenoid - Solenoids
3.0L SHO - Low Speed Fuel Pump Relay circuit - Power / Fuel Pump Circuits
84 EGR Vacuum Regulator - Solenoids
EGR cutoff solenoid - Solenoids
EGR Vent solenoid - Solenoids
85 2.3L T/C Automatic - 3/4-4/3 Shift solenoid - Transmissions
CANP solenoid (ALL 1989) - Solenoids
(M) 1.9L MFI - System has corrected rich condition - Fuel control
86 2.3L or 2.9L Truck - A4LD 3/4 shift solenoid - Transmissions
(M) 1.9L MFI - System has corrected lean condition - Fuel control
87 (O) Fuel pump circuit fault (check inertia switch) - Power / Fuel Pump Circuits
Vehicles with 2BBL carb - Temperature Compensated Accelerator Pump Solenoid - Solenoids
(M) intermittent in fuel pump primary circuit - Power / Fuel Pump Circuits
NOTE: On some Escorts with automatic seat belts this code is normal IN MEMORY due to the wiring
88 Throttle Kicker Solenoid - Solenoids
Variable Voltage Choke relay circuit fault - VVC
Fan Control circuit fault - A/C and Fan Circuits
A4LD - Converter Clutch Override solenoid - Transmissions
Electronic Ignition - IDM, DPI or spout circuit fault - Ignition Systems
89 A4LD - Converter Clutch Override solenoid - Transmissions
AXOD Torque Converter Control solenoid circuit - Transmissions
Exhaust Heat Control (heat riser) solenoid circuit - Solenoids
90 SERIES FUEL/AIR INJECTION CODES ON VEHICLES WITH DUAL OXYGEN SENSORS REFER TO THE LEFT OR FRONT SENSOR. EXCEPT: 1984-1988 3.8L ENGINES: RIGHT SENSOR
91 (R, M) System running lean - Fuel control
Transmission SS 1 circuit/solenoid problem - Transmissions
92 (R) System running rich - Fuel control
Transmission SS 2 circuit/solenoid problem - Transmissions
93 (O) Throttle linkage binding or bad ISC motor ISC (R) HO2S not reading - Fuel control
Transmission TCC circuit/solenoid problem - Transmissions
94 AIR system inoperative - Air Injection
Transmission TCC circuit/solenoid problem - Transmissions
95 (O) Fuel pump: open, bad ground or always on - Power / Fuel Pump Circuits
(R) AIR not Diverting (AIRD) - Air Injection
(M) Possible bad fuel pump ground or open between fuel pump and pin 8 at PCM (Fuel Pump Monitor signal) - Power / Fuel Pump Circuits
96 (O) Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits
(R) AIR Bypass (AIRB) not working - Air Injection
(M) (Service 87 code first if present) Fuel pump relay or battery power feed was open - Power / Fuel Pump Circuits
97 E4OD OD cancel light circuit failure - Transmissions
98 (R) Did not pass KOEO yet (Get 11 in KOEO first)
Transmission EPC circuit/solenoid failure - Transmissions
99 (R) ISC needs to learn (Let idle for 2 minutes; Erase memory and retest)
Transmission EPC circuit/solenoid failure - Transmissions
Definitions:

ACT Air Charge Temperature Sensor / BP See MAP /
EEC Electronic Engine Control System
ECT Engine Coolant Temperature Sensor
EGR Exhaust Gas Recirculation Valve
-- EVP Valve Position Sensor
EGR / HEGO Heated Exhaust Gas Oxygen Sensor
KOEO Key On Engine Off
KOER Key On Engine Running
MAF Mass Air Flow Sensor
MAP Manifold Absolute Pressure Sensor
MLP Manual Lever Position
PCM Powertrain Control Module
SPOUT Distributor Jumper to Allow Initial Timing
TP Throttle Position Sensor
 




BrooklynBay

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Here is an article from http://www.muscularmustangs.com/test1.php with a lot of good troubleshooting information.

Checking your Ford Mustang computer codes.
2 Digit Codes 3 Digit Codes.
TYPES OF CODES.
NOTE: Some people have problems distinguishing the different codes. READ THIS SECTION CAREFULLY.
There are drawings of the code formats at the end of this section.

FAST CODES.
Fast codes contain the fault information output in the normal slow codes but are output about 100 times faster.
These are the first things output on a Key On Engine Off test.

HARD FAULTS.
Hard faults are problems that the computer has located RIGHT NOW. Examples are a sensor out of range or a broken wire (open circuit).
Hard faults are the FIRST set of slow codes output in a Key On Engine Off test. BEFORE the SEPARATOR pulse.
In a Key On Engine Running test, there are ONLY HARD FAULT codes. These are output right after the fast codes.

SEPARATOR PULSE.
The separator pulse is a single pulse that indicates the END of hard fault codes and the BEGINNING of memory codes.
It will show up as a code 10 on most digital testers.

MEMORY CODES.
Memory codes are problems that the computer has noticed in the past. If for example there was a loose wire to a solenoid that only lost contact while driving but was making contact while testing the system there would be NO HARD FAULT CODE. The code would show up IN MEMORY. The same would happen for a sensor that only went out of range occasionally. Memory codes come out AFTER the separator pulse.
NOTE: The computer will erase the memory after a certain number of engine re-starts if the problem does not repeat itself. The number of re-starts varies from 20 to 80 depending on the year of the vehicle. The later models keep memory longer.

ENGINE ID.
The engine ID in a running test is a series of pulses equal to one half the number of engine cylinders. A 4 cylinder engine ID is 2 pulses, a 6 cylinder ID is 3 pulses and an 8 cylinder ID is 4 pulses. A diesel ID is 5.

GOOSE CODE.
A "GOOSE" code (also called a dynamic response test) is output during an engine running test. This is a single pulse to signal you to quickly move the throttle approximately 1/2 way down and release. NOTE: Not all engines give a "GOOSE" code.

CODE FORMATS.
Codes are output as a series of pulses. The following charts show the (approximate) timing of the various code pulses.
NOTE: Two digit codes are shown. Three digit codes have similar timing. It just takes a little practice to distinguish between two and three digit types.

eec1.gif


TESTS.
NOTE: Vehicle should be fully warmed for all tests.

HOOKUP.
See figure below. EEC IV vehicles have two connectors for self testing the system. They are located on the firewall or the left or right front fender. The large connector contains the self test output (STO) and ground (SIG RTN). The small pigtail is the self test input (STI).

eec2.gif


1. Make sure engine is fully warmed. If in doubt, run engine at 2000 rpm for 2 minutes.
2. Turn ignition off and wait 10 seconds for system to shut off. Make sure A/C is off and transmission is in Park (automatic) or Neutral (manual).
3. Hook up light and jumper (or a tester if you have one). Turn key to ON (do not start engine).
4. Fast Codes are output (ignore fast light flashes).
5. Read hard faults.
6. Separator Pulse.
7. Read memory codes.
8. See code explanations and check components as necessary.
Use FIRST CODE OUTPUT and retest after any repairs are made.

KEY ON ENGINE RUNNING (KOER) TEST.

1. Make sure engine is fully warmed. If in doubt, run engine at 2000 rpm for 2 minutes.
2. Turn ignition off and wait 10 seconds for system to shut off. Make sure A/C is off and transmission is in Park (automatic) or Neutral (manual).
3. Hook up light and jumper (or tester if you have one).
4. Make sure vehicle is safe to run and start engine.
5. Engine I.D. should be output.
6. Step on brake and turn steering wheel 1/4 turn.
7. If a "Goose" pulse is received, move throttle quickly 1/2 way down and release.
8. Fast Codes are output (ignore).
9. Read codes.
10. See code explanations and check components as necessary.
Use FIRST CODE OUTPUT and retest after any repairs are made.

CYLINDER BALANCE TEST.
NOTE: This test is only available on Sequential Fuel Injection (SFI) Engines.
Start an engine running test and press the accelerator lightly within 2 minutes after the last code is output. The PCM will cancel each cylinder in turn and measure the RPM drop. If any weak cylinders are noted their number will be output as a multiple of 10 (e.g. 30, 40). The output is the actual cylinder number, not the number in the firing order. NOTE: Will not always pinpoint bad injectors.

WIGGLE TEST.
Engine running or engine off tests
Hook up for a self test but do not hook up the self test trigger. Turn key to on. Hook up the trigger, wait 10 seconds and disconnect. Hook up trigger again . Tap suspected sensors (be careful if engine is running), wiggle the wiring harnesses etc. IF the PCM picks up a fault the self test output will pulse and a memory code will be stored (The value of this is questionable. I NEVER located a problem with it. - JT).

MEMORY ERASE.
To erase the memory disconnect the self test trigger while the codes are being output. You COULD also disconnect the battery but then the PCM forgets some important running characteristics.

OUTPUT STATE TEST.
Run the KOEO test all the way through and leave the test hooked up.
Cycle throttle 3/4 open and closed while watching tester, light or voltmeter. Self test output will switch with every throttle activation. On some testers (like my old pocket testers) the light will only pulse every other push. But the outputs still switch EVERY time.
Solenoids (EGR etc.) will switch on or off with every throttle activation (push throttle they're on, push throttle they're off). You should be able to hear clicks as the solenoids switch states. The test will work for most solenoids: AIRB, AIRD, BOOST, EGR, EVR (NOTE: EVR does not click but vacuum cycles).
 




Snyder1938

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I'm a new member. Found great news on cleaning front axle + hub to cure vibration. Another reoccuring problem is engine code 214, "error in cyl ID". No idea of what to check. 4.0 engine runs fine. Any help appreciated. Thanks.
 




BrooklynBay

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BrooklynBay

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BrooklynBay

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Tbars4

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... I ran across these when searching thru this thread and not being able to find a few hard to find codes for a 1994 X...You may delete and edit as you wish...:salute:
http://www.justanswer.com/questions/1bqqo-own-94-ford-explorer-recently

Diagnostic Trouble Codes - 1994
Ford
111 System PASS.
112 ACT sensor circuit grounded.
113 ACT sensor circuit open.
114 ACT sensor is out of Self-Test.
116 ECT sensor is out of Self-Test.
117 ECT sensor circuit grounded.
118 ECT sensor circuit open.
121 TP sensor is out of Self-Test.
122 TP sensor input is less than Self-Test minimum.
123 TP sensor input is greater than Self-Test maximum.
124 TP sensor input voltage is greater than expected.
125 TP sensor input voltage is less than expected.
128 MAP vacuum hose damaged or disconnected.
129 Insufficient MAF input.
136 HEGO sensor circuit indicates system lean (Right HEGO).
137 HEGO sensor circuit indicates system rich (Right HEGO).
139 No HEGO switching (Front Side).
141 Fuel system indicates lean.
144 No HEGO switching (Left Side).
157 MAF sensor circuit open.
158 MAF sensor shorted to power.
159 MAF sensor is out of Self-Test.
167 Insufficient TP input change.
171 Lack of HEGO switching (Rear Side).
172 HEGO sensor circuit indicates lean. (Rear Side).
173 HEGO sensor circuit indicates rich. (Rear Side).
174 Check for diluted engine oil.
175 Lack of HEGO switching (Front Side).
176 HEGO sensor circuit indicates lean. (Front Side).
177 HEGO sensor circuit indicates rich. (Front Side).
178 Check for diluted engine oil.
179 Fuel system at part throttle lean adaptive limit, system rich (Rear Side).
181 Fuel system at part throttle rich adaptive limit, system lean (Rear Side).
182 Fuel system at idle lean adaptive limit, system rich (Rear Side).
183 Fuel system at idle rich adaptive limit, system lean (Rear Side).
184 MAF sensor input voltage is greater than expected, in range.
185 MAF sensor input voltage is less than expected, in range.
186 Closed loop injector pulse width longer than expected.
187 Closed loop injector pulse width shorter than expected.
188 Fuel system at part throttle lean adaptive limit, system rich (Front Side).
189 Fuel system at part throttle rich adaptive limit, system lean (Front Side).
193 Flexible Fuel sensor circuit failure.
211 PIP circuit failure.
212 Loss of tachometer/IDM input.
213 EEC SPOUT circuit open.
214 CID circuit failure.
215 PCM detected coil 1 primary circuit failure.
216 PCM detected coil 2 primary circuit failure.
217 PCM detected coil 3 primary circuit failure.
218 Loss of ignition diagnostic monitor signal-left side.
219 Spark timing defaulted to 10 degrees, spark output circuit open.
221 Spark timing error.
222 Loss of ignition diagnostic monitor signal-right side.
223 Loss of dual plug inhibit control.
224 PCM detected coil 1, 2, 3 or 4 primary circuit failure.
225 Knock not sensed during dynamic response test KOER.
226 Ignition diagnostic monitor signal not received.
232 PCM detected coil 1, 2, 3 or 4 primary circuit failure.
238 PCM detected coil 4 primary circuit failure.
241 Ignition control module to PCM ignition diagnostic monitor pulse width transmission error.
244 Cylinder Identification circuit fault present when cylinder balance test requested.
311 Secondary air injection system inoperative during KOER self-test (bank #1).
312 Secondary air injection system misdirected during KOER self-test.
313 Secondary air injection system not bypassed during KOER self-test.
314 Secondary air injection system inoperative during KOER self-test (bank #2)
326 PFE sensor circuit voltage lower than expected.
327 PFE sensor circuit voltage below Self-Test minimum.
328 Exhaust gas recirculation valve position sensor closed voltage lower than expected.
332 Insufficient EGR flow.
334 Exhaust gas recirculation valve position sensor closed voltage higher than expected.
335 PFE sensor circuit voltage out of Self-Test range.
336 PFE sensor circuit voltage higher than expected.
337 PFE sensor circuit voltage above Self-Test maximum.
338 Engine coolant temperature lower than expected (thermostat test).
339 Engine coolant temperature higher than expected (thermostat test).
341 Octane adjust service pin open.
381 Frequent A/C clutch cycling.
411 Cannot control RPM during KOER low RPM check.
412 Cannot control RPM during KOER high RPM check.
415 Idle Air Control system at maximum adaptive lower limit.
416 Idle Air Control system at upper adaptive learning limit.
452 Insufficient input from VSS.
453 Servo leaking down.
454 Servo leaking.
455 Insufficient RPM increase.
456 Insufficient RPM decrease.
457 Speed control command switch(s) circuit not functioning.
458 Speed control command switch(s) stuck/circuit grounded.
459 Speed control ground circuit open.
511 ROM test failure.
512 KAM test failure.
513 EEC internal voltage failure.
519 PSPS circuit open.
521 PSPS circuit did not change.
522 Vehicle not in PARK or NEUTRAL during KOEO.
525 Indicates vehicle in gear or A/C "ON" during self-test.
527 Park/Neutral Position switch circuit open or A/C on KOEO self-test.
528 Clutch Pedal Position switch circuit failure.
529 Data Communication Link or PCM circuit failure.
532 Cluster Control Assembly circuit failure.
533 Data Communication Link or Electronic Instrument Cluster circuit failure.
536 Brake On/Off circuit failure/not activated during KOER.
538 Insufficient RPM change during KOER Dynamic Response Test.
539 A/C or defrost "ON" during Self-Test.
542 Fuel pump circuit open, EEC processor to motor ground.
543 Fuel pump circuit open, battery to EEC processor.
551 Idle Air Control circuit failure during KOEO self-test.
552 Secondary Air Injection Bypass circuit failure during KOEO self-test.
553 Secondary Air Injection Diverter circuit failure during KOEO self-test.
554 Fuel Pressure Regulator Control circuit failure.
556 Fuel pump circuit failure.
557 Low speed fuel pump primary circuit failure.
Electronic Vacuum regulator circuit failure.
559 Air Conditioning On relay circuit failure during KOEO self-test.
562 Pusher fan control primary circuit failure.
563 High speed Electro Drive Fan circuit failure.
564 Electro Drive Fan circuit failure
565 Canister purge (CANP) circuit failure.
566 3-4 shift solenoid circuit failure during KOEO self-test.
567 Speed Control Vent (SCVNT) circuit failure.
568 Speed Control Vacuum (SCVAC) circuit failure.
569 Auxiliary Canister Purge circuit failure during KOEO self-test.
571 EGR Atmospheric (EGRA) solenoid circuit failure during KOEO self-test.
572 EGR Vacuum (EGRV) solenoid circuit failure during KOEO self-test.
578 A/C pressure sensor circuit shorted.
579 Insufficient A/C pressure change.
581 "Power to Fan" circuit over current.
582 Fan circuit open.
583 Power to Fuel pump over current.
584 Variable Control Relay Module (VCRM) power ground circuit open (VCRM Pin 1).
585 Power to A/C clutch over current.
586 A/C clutch circuit open.
587 Variable Control Relay Module communication failure.
593 Heated Oxygen Sensor (HO2S) heater circuit failure.
617 1-2 shift error.
618 2-3 shift error.
619 3-4 shift error.
621 Shift solenoid #1 circuit failure.
622 Shift solenoid #2 circuit failure.
623 Transmission Control Indicator Light circuit failure.
624 EPC solenoid or driver failure.
625 EPC solenoid driver open in EEC processor.
626 Coast Clutch Solenoid (CCS) circuit failure during KOEO self-test.
627 Torque Converter Clutch solenoid circuit failure.
628 Lock-up solenoid circuit failure, excessive clutch slippage.
629 Lock-up solenoid circuit failure.
631 Transmission Control Indicator Lamp circuit failure during KOEO self-test.
632 Transmission Control Switch circuit did not change states during KOER self-test.
633 4x4 Light switch closed during KOEO self-test.
634 MLP sensor voltage out of Self-Test range.
636 Transmission oil temperature sensor voltage out of Self-Test range.
637 Transmission oil temperature sensor voltage above Self-Test maximum.
638 Transmission oil temperature sensor voltage below Self-Test minimum.
639 Insufficient input from turbine speed sensor.
641 Shift solenoid #3 circuit failure.
643 Torque Converter Clutch circuit failure.
645 Incorrect gear ratio obtained for first gear.
646 Incorrect gear ratio obtained for second gear.
647 Incorrect gear ratio obtained for third gear.
648 Incorrect gear ratio obtained for fourth gear.
649 EPC range failure.
651 EPC circuit failure.
652 Torque Converter Clutch solenoid circuit failure.
653 Transmission Control Switch did not change states during KOER self-test.
654 Transmission Range sensor not indicating "PARK" during KOEO self-test.
656 Torque Converter Clutch continuous slip error.
657 Transmission over temperature condition occurred.
659 High vehicle speed in park indicated.
667 Transmission Range sensor circuit voltage below minimum voltage.
668 Transmission Range circuit voltage above maximum voltage.
675 Transmission Range sensor circuit voltage out of range. Hard fault present, vehicle is in Failure Mode Effects Management (FMEM).
998 Hard faults present.
 




Colin2722

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i just wanted to thank you guys for this endless information. fixed my cel in less then 30 min thanks to this site. it ended up being a dirty vat sensor which was making my exploder jump all over the place. now (for free) i have it running like normal
 




SLDoolittle

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i bought a Ford Explore about two weeks ago and it was running good and now it seems like it running out of gas even when it has gas i get a code out of the self test of 115 and there is no code in the book. can anyone please help me out ?
 




BrooklynBay

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jenna002

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whys code 341 in your post always in red .I am getting this code. anyone know what this is and how to check and fix?
 




BrooklynBay

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jenna002

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do you mean next to the koeo tester or the other diagnostic testers. does this code affect how your vechicle performs or affect gas mileage?
 




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