Bunch of Codes, Rough idle and poor mileage. | Ford Explorer Forums - Serious Explorations

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Bunch of Codes, Rough idle and poor mileage.

Firemedic89

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January 23, 2015
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Year, Model & Trim Level
Explorer 2002
Hey all, New here. I have a 2002 Explorer with the 4.0 and 247,x... I've been having a poor idle issue and poor fuel mileage for some time now. The issue is worse some days then others.

Within the past few months I have changed plugs, wires, coil block (Motorcraft), Both front 02 sensors and side 1 bank 2 sensor.


I have AE and pulled the following codes off of it:

-P0171 System Too Lean (Bank 1)

-P0401 Exhaust Gas Recirculation Flow Insufficient Detected

-P0732 Gear 2 Incorrect Ratio

-P1130 Lack Of HO2S11 Switches - Fuel Trim At Limit

-P1131 Lack Of HO2S11 Switches - Sensor Indicates Lean

-P1132 Lack Of HO2S11 Switches - Sensor Indicates Rich

**Freeze Frame for DTC P0171**

Fuel System Status Bank One Closed Loop Fuel System Status Bank Two Not Reported

Calculated Load 71 % Coolant Temperature 190 F

Short Term Fuel Trim Bank One 3.90 %
Long Term Fuel Trim Bank One 24.18 %

Short Term Fuel Trim Bank Two 2.34 %
Long Term Fuel Trim Bank Two 0.00 %

Engine RPM 1653 r/min Vehicle Speed 50 MPH

Any help is greatly apprecieated.
 



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A vacuum leak would explain the lean and high fuel trim codes. ..
 






























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