Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-P015800

Condition




The engine control module (ECM) is based on two initial sensor voltage values, 0 V and 5 V.
If probe preheating is active and if at least one fuel shut-off (accelerator pedal released for at least 3 seconds) has been made, the rear heated oxygen sensor (bank 2) maximum value must have exceeded 0.6 V and the minimum value must have been below 0.1 V.
The engine's cylinders are counted starting with the cylinder farthest from the engine's flywheel.
If these limit values are not reached after approx. 5 minutes and the accumulated as well as the current sensor preheating, respectively, have reached certain limit values, the engine control module (ECM) interprets this as a malfunction and generates the diagnostic trouble code.
The diagnostic trouble code can be diagnosed with the engine running.

Substitute value
- Rear heated oxygen sensor control off.

Possible source
- The signal cable is short-circuited to voltage.
- Damaged rear heated oxygen sensor (HO2S).

Fault symptom[s]
- Malfunction indicator light (MIL) on.