Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-246B

Condition




The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the calibration current has ceased and the front heated oxygen sensor (HO2S) signal is implausibly high at fuel shut-off.

Substitute value
None.

Possible source
- Contact resistance and oxidation in the terminals
- Open-circuit in the cable for calibration current
- Damaged front heated oxygen sensor (HO2S).

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