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Can't get rid of Wrench Light

jjr329

Member
Joined
November 16, 2015
Messages
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City, State
North Aurora, IL
Year, Model & Trim Level
2004 Explorer XLT
2004 Explorer XLT 4.0 V6 4x4

Approx 136.5K

Truck starts fine, idles fine, shifts fine in all gears, and drives just fine. Problem is randomly (and sometimes I can force it to happen) I get a wrench light sometimes with a Service Engine Soon light and sometimes without. 4x4 seems to work fine, I can put it in 4 high and 4 low. I never use 4 low and leave it in Auto 99.9% of the time.

Has happened during idle, cruise, light acceleration as well as heavy acceleration. Can happen cold or warm. Goes into Forced limited mode which cuts power but otherwise drives fine.

If it's just the wrench it goes away if I cycle the truck on and off, but comes back anywhere from 50ft to 50 miles later. Lately I seem to get it once or twice a day.

Generic reader shows P2106 and P0606 only.

Bought a USB reader and used FORscan to get the messages below. The same codes with the exception of the P1812 show up with no wrench or SES light.

I've only owned it for a few thousand miles. The previous owner did take good care of it and replaced a lot of stuff over the years.

Since I've bought it I've done the following:
Deleted balance shaft chain (BS tensioner had failed) and recovered broken plastic and metal leaf from girdle.
Replaced primary crank to jackshaft tensioner (didn't fail but since I was in there...)
Replaced both hydraulic tensioners
Replaced the Crank Position Sensor and the Harmonic Balancer.
Replaced the Throttle position sensor on the TB and cleaned the TB.
Changed all fluids (F&R diffs including friction modifier in rear, coolant, transfer case, trans fluid, oil)
Serp belt + idler + tensioner
UCA's which I disconnected the ABS wires and forgot to plug them back in.

I've also checked all fuses, and checked for bad grounds and frayed wires.

At this point I'm out of ideas. Was hoping to get a year or two out of this and pass it along to my brother, but I'm really starting to not trust it. It's never left me stranded but this wrench/SES stuff is really annoying me.

Code:
===PCM DTC P0606-FF===
Code: P0606 - ECM/PCM Processor

Module: Powertrain Control Module

Diagnostic Trouble Code details

ECM/PCM Processor

Faulty or damaged PCM.

RAM / ROM circuit failure.

===END PCM DTC P0606-FF===

===PCM DTC P1000-FF===
Code: P1000 - On-Board Diagnostic (OBD) Systems Readiness Test Not Complete

Module: Powertrain Control Module

Diagnostic Trouble Code details

Check of all systems is not complete since last memory clear.

--Possible Causes--
	- The vehicle is new from the factory and has not yet been through a complete OBD Drive Cycle.
	- The battery or PCM has been disconnected.
	- An OBD monitor failure had occurred prior to completion of an OBD Drive Cycle.
	- The PCM DTCs have been cleared as part of a service process.

Note: The only way P1000 can be cleared (removed) from memory is when all of the OBD monitors have been successfully completed during normal vehicle operation.

P1000 cannot be cleared from the PCM when: 1. The thermostat is stuck open and a DTC is not generated. 2. There is an open VSS circuit and a DTC is not generated. 3. If the vehicle has a Power Take Off (PTO), the circuit is shorted to VPWR or B+, or the PTO is ON during Self-test.

The purpose of the Diagnostic Trouble Code DTC P1000 is to indicate that not all of the On Board Diagnostics OBD monitors have yet been successfully completed.  You may also refer to the OBD Drive Cycle defined under the Powertrain Control/Emission Diagnosis Manual-Diagnostic Methods or the Owner's Manual.

Remember: It is not necessary to remove P1000 from the Powertrain Control Module PCM by driving the vehicle.

===END PCM DTC P1000-FF===

===PCM DTC P2106-FF===
Code: P2106 - Throttle Actuator Control System - Forced Limited Power

Module: Powertrain Control Module

Diagnostic Trouble Code details

Throttle Actuator Control System - Forced Limited Power

Possible causes are:

Harness wiring

Accelerator Pedal Position Sensor

Throttle Body Assembly

Throttle Position Sensor

PCM

===END PCM DTC P2106-FF===

===OBDII DTC P0606-C===
Code: P0606 - ECM/PCM Processor

Status: 
 - Confirmed - malfunction is confirmed 

Module: On Board Diagnostic II

Diagnostic Trouble Code details

ECM/PCM Processor

Faulty or damaged PCM.

RAM / ROM circuit failure.

===END OBDII DTC P0606-C===

===4X4M DTC P1812-2F===
Code: P1812 - Four wheel drive mode select circuit failure

Status: 
 - Previously Set DTC - Not Present at Time of Request
 - Malfunction Indicator Lamp is Off for this DTC

Module: 4X4 Control Module

Diagnostic Trouble Code details

Four wheel drive mode select circuit failure

--- Possible Causes --------
  P1812 can be generated by:


-Open 4-Wheel Drive Mode Switch

-Suspect 4-Wheel Drive Mode Switch

-Suspect Generic Electronic Module


NOTE: For Vehicles with 4x4 Option

If you encounter this code when you are in 4x4 Low mode, rerun the Self-Test in the 4x2 High mode. If you still generate code P1812, there is a 4-Wheel Drive Switch/Circuit problem.

===END 4X4M DTC P1812-2F===

===4X4M DTC U2023-2F===
Code: U2023 - Fault Received from External Node

Status: 
 - Previously Set DTC - Not Present at Time of Request
 - Malfunction Indicator Lamp is Off for this DTC

Module: 4X4 Control Module

Diagnostic Trouble Code details

Fault Received from External Node

This DTC may be caused by :

Short circuit on the CAN line.

Open circuit on the CAN line.

There is a time out between two modules on the CAN bus

There is Interference on the CAN bus

There may be other modules on the CAN communication data line that are not communicating and are timing out.

Note:

DTCs that start with 'U' are faults which occur during module-to-module communication.

Modules should never be replaced based only on a 'U' code. These codes do not always indicate a problem, and can be caused by normal diagnostic functions, carried out on the vehicle.

===END 4X4M DTC U2023-2F===

===ABS DTC C1145-20===
Code: C1145 - Right Front Wheel Speed Sensor Input Circuit Failure

Status: 
 - Previously Set DTC - Not Present at Time of Request
 - Malfunction Indicator Lamp is Off for this DTC

Module: Anti-Lock Brake / Traction Control Module

Diagnostic Trouble Code details

Right Front Wheel Speed Sensor Input Circuit Failure

This DTC may be caused by :

Sensor

Short circuit

Sensor Previously disconnected.

Open circuit

Damaged or contaminated connector

===END ABS DTC C1145-20===

===ABS DTC B1676-20===
Code: B1676 - Battery Voltage out of range

Status: 
 - Previously Set DTC - Not Present at Time of Request
 - Malfunction Indicator Lamp is Off for this DTC

Module: Anti-Lock Brake / Traction Control Module

===END ABS DTC B1676-20===

===ABS DTC C1155-20===
Code: C1155 - Left Front Wheel Speed Sensor Input Circuit Failure

Status: 
 - Previously Set DTC - Not Present at Time of Request
 - Malfunction Indicator Lamp is Off for this DTC

Module: Anti-Lock Brake / Traction Control Module

Diagnostic Trouble Code details

Left Front Wheel Speed Sensor Input Circuit Failure

This DTC may be caused by :

Sensor

Short circuit

Open circuit

Sensor Previously disconnected.

Damaged or contaminated connector

===END ABS DTC C1155-20===

===IC DTC U2013-20===
Code: U2013 - The compass module is not responding.

Status: 
 - Previously Set DTC - Not Present at Time of Request
 - Malfunction Indicator Lamp is Off for this DTC

Module: Instrument Cluster

Diagnostic Trouble Code details

The compass module is not responding.

Operator Action

Run self test.

All CMDTCs

Fix all relevant DTCs then clear codes and retest.

Note:

DTCs that start with 'U' are faults which occur during module-to-module communication.

Modules should never be replaced based only on a 'U' code. These codes do not always indicate a problem, and can be caused by normal diagnostic functions, carried out on the vehicle.

===END IC DTC U2013-20===

===PAM DTC C1701===
Code: C1701 - Rear Outer Left Sensor Fault

Module: Parking Aid Module

Diagnostic Trouble Code details

Rear Outer Left Sensor Fault

---------------- Possible Causes --------------


Internal sensor failure.



Check if sensor face is free from obstructions.

===END PAM DTC C1701===

===RCM DTC None===
Successful DTC reading, no error codes found

Module: Restraint Control Module

===END RCM DTC None===

Here's versioning and modules from FORscan:

Code:
Interface: 
Type: FTDI #1:, 115200 kbps
Adapter: STN1130 v4.0.1 (ELM327 v1.3a)
Min.delay: 15 ms ( Good)
Errors: 
- UNKNOWN COMMAND: 1 ( 0.2% )

Vehicle: 
Model: Ford Explorer
Engine: V6 SOHC
Capacity: 4.0L
Year: 2004
Generation: 2004 MY
Fuel: Gasoline
Transmission gear: Automatic
VIN: ***

PCM - Powertrain Control Module
Part number: 4L2ADJ
Strategy : PWAP9A4
Copyright Ford Motor Co. 2003

OBDII - On Board Diagnostic II

4X4M - 4X4 Control Module
Part number: 4L2A-001D0D-CB
Strategy : SW-4L2A-000T0D-CB
Calibration: CA-4L2A-000T0D-CB
Software version: v3 2003-02-20

ABS - Anti-Lock Brake / Traction Control Module
Part number: 4L2T-2C219-BE
Software version: 2003-03-28

IC - Instrument Cluster
Part number: 4L2T-10849-LF
Strategy : 4L2T-14C026-AA
Software version: 2003-05-16
Odometer: 219672.6 km

PAM - Parking Aid Module
Part number: 1L2T-15T850-AG
Software version: 1997-12-11

RCM - Restraint Control Module
Part number: 4L24-14B321-AA
Software version: v4 2002-01-02
 


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anthonymtz

Well-Known Member
Joined
November 17, 2014
Messages
205
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4
City, State
Fort Worth
Year, Model & Trim Level
2004 Ford Explorer XLT
Maybe it's the pcm...? I read somewhere where this one guy had the same issue and replaced a pcm (no sure which one) but it fixed all the issues with the malfunctioning computer setting a false reading.
 




apenland01

Well-Known Member
Joined
September 11, 2009
Messages
324
Reaction score
18
City, State
Tucson AZ
Year, Model & Trim Level
2005 Eddie Bauer V8 4.6L
I'm assuming you reset the PCM after all this work on the throttle body and stuff? Simple suggestion if you haven't done it since you did all the work.

Good luck!
 




jjr329

Member
Joined
November 16, 2015
Messages
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City, State
North Aurora, IL
Year, Model & Trim Level
2004 Explorer XLT
I did not do a specific PCM clearing. TPS instructions did not note that was needed. I will try this today: https://www.youtube.com/watch?v=hZAsoqmqhdM

I did have the battery disconnected for awhile but I don't remember for how long. The TPS and CPS work spanned 2 days because I drained the battery enough from not driving it and working on it that it would not crank. After swapping parts back and forth to no avail I let it sit overnight and had an epiphany the next morning and hooked up my battery jumper and it started right up.
 




jjr329

Member
Joined
November 16, 2015
Messages
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City, State
North Aurora, IL
Year, Model & Trim Level
2004 Explorer XLT
PCM clearing did not help. I also tried a new TC shift motor which also did not help. It actually stalled on me for the first time ever during my ~60 mile test drive (not the first drive since PCM clearing, was the second after I did the re-learn). Happened during a right turn. As I straightened out and gave it a little gas as this was a slightly hilly road it just stalled. Tossed in N and it would not restart while moving. Made it to the top of the hill and got on the small shoulder. Turned key off and it then started fine.

So it very well could be the PCM itself. I'm guessing that's a dealer only kind of replacement?
 




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