Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-240C

Condition




The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the resistance in the preheating circuit for the front heated oxygen sensor (HO2S) (bank 1) is too high.

Substitute value
- None.

Possible source
- Contact resistance and oxidation in the terminals
- Damaged front heated oxygen sensor (HO2S).

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