Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




Engine Control Module (ECM) checks the front heated oxygen sensor's signal (bank 1).
The Engine control module (ECM) actively regulates between rich and lean fuel / air mixture and registers how well the front heated oxygen sensor (HO2S) signal follows these changes.
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) registers that the heated oxygen sensor (HO2S) is not activated or is activated too slowly.
The diagnostic trouble code (DTC) can be diagnosed with the engine at operating temperature, approximately 20 minutes after the engine has first been started if the vehicle is driven (normal road load) at 70-90 km/h for 40-50 seconds.

Substitute value
- Nothing.

Possible source
- Contact resistance in the terminals
- Short-circuit between wiring.
- Damaged front heated oxygen sensor (HO2S).

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