Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
- The system will become lean if a fuel injector is not supplying enough fuel.
- A lean condition may be present during high fuel demand due to a fuel pump that does not deliver enough fuel, a plugged fuel filter, or a restricted fuel pipe.
- A failed HO2S will not cause DTC P2097 to set without the occurrence of circuit related HO2S DTCs. Do not replace an HO2S to address this DTC.
- The post catalyst fuel trim diagnostic is very sensitive to heated oxygen sensor (HO2S) design. A non-OE sensor or an incorrect part number may cause a DTC to set.
- An exhaust system leak that may not be audible can set these DTCs.
- Certain aftermarket air filters may cause a DTC to set.
- Certain aftermarket air induction systems or modifications to the air induction system may cause a DTC to set.
- Certain aftermarket exhaust system components may cause a DTC to set.