Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-280C

Condition
Diagnostic trouble code (DTC) ECM-280C is stored if the engine control module (ECM) detects that both front heated oxygen sensors (HO2S) bank 1 and 2 have been switched (mounted in the incorrect bank of cylinders). The diagnostic trouble codes (DTCs) are diagnosed when the engine has been idling for 10 minutes

Substitute value
- Long-term fuel trim is switched off
- Three-way catalytic converter (TWC) diagnostics are disabled.

Possible source

Faulty signal:
- Front heated oxygen sensors (HO2S) are mounted in the incorrect cylinder banks
- Fuel injection system leakage
- Both the front heated oxygen sensors (HO2S) are defective.

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.