Oil Level Sensor: Description and Operation

LOW OIL
The IPC illuminates the LOW OIL indicator when the following occurs:
^ The PCM detects a low engine oil level condition (signal circuit is high). The PCM only monitors the oil level switch signal circuit for a brief period between key on and engine crank. The IPC receives a class 2 message from the PCM requesting illumination. The IPC sends a class 2 message to the Body Control Module (BCM) indicating that the LOW OIL indicator is illuminated. The BCM sends a class 2 message to the radio in order to activate an audible warning.
^ The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.