Optical Oil Level Message

Engine Oil Level Sensor/ Generator/ EBTCM/ Shift Select Switch:

Circuit Description
This vehicle is equipped with an Optical Oil Level sensor to detect a low oil level condition. The sensor is powered through CKT 339 and grounded through CKT 451. The oil level input is CKT 1174 to PCM connector C2 terminal 58. The input is normally low voltage to the PCM that switches high for 1 second after ignition ON to check for system faults. Normal operation of the sensor is a low to high to low voltage system check, then, if the sensor remains low, a low oil level is indicated, if after approximately 10 seconds the signal goes high, a normal oil level is indicated. A system fault will be detected if the PCM never detects the low to high to low pulse, circuit voltage always high or always low.

Test Condition
DTCs P0117, P0118 or P0603 not set.

Failure Condition
Low oil level circuit voltage is always high or always low.


Diagnostic Aids

Note: This message could be displayed if a DTC P0603 was set. Always diagnose a DTC P0603 before using this diagnostic table.

The Oil Level Problem message indicates a sensor/circuit fault and does not indicate the oil level is low.