Service Engine Soon Light And DTC P1125 P2101 P2120 P2125 Or P2138 - keywords 3.8 body harness hesitation L26 MIL mode power reduced SES throttle wiring

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Some customers may comment that the Service Engine Soon light is illuminated. In addition some may also comment that the vehicle was exhibiting a hesitation and/or had the "reduced power mode" symbol or message displayed. When checking for diagnostic Trouble Codes (DTC) in the Powertrain Control Module (PCM), codes P1125, P2120, P2125 or P2138 may be found.

1. Remove the engine cover.



2. Inspect the underside of the wiring harness for evidence of chafing on the intake manifold.



3. If chafing is found on the conduit, then open the wiring harness and inspect the wires for damage.



4. Inspect all the wires in the area where the chafing occurred and repair as necessary. Pay close attention to the black wire (Circuit 1161).
5. Place the wires back inside the conduit and reposition the conduit on the engine so that wiring conduit no longer rubs against the manifold when the engine cover is installed.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.