Oil Level Sensor, Diagnostics

General 

The engine control module (ECM) can diagnose the oil level sensor. A diagnostic trouble code (DTC) will be stored if an internal fault is detected in the oil level sensor or if there is an open-circuit or a short-circuit to ground or voltage in its wiring connectors. A diagnostic trouble code (DTC) will also be stored if the oil level is too low or high or if the oil level drops rapidly over a certain time (leakage).

The pulse ratio of all the oil level sensor pulses in a pulse train must be within the normal operating range of 17-83 %. If this is exceeded, a diagnostic trouble code (DTC) will be stored in the engine control module (ECM).

HINT: Extremely diluted engine oil can result in a diagnostic trouble code (DTC) for the oil level being stored in the engine control module (ECM).