Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-240B

Condition




The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that there has been no control of the heater element for the front heated oxygen sensor (HO2S) for a certain amount of time.

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.