Low Eng Oil Level
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
The IPC illuminates the LOW ENG OIL LEVEL indicator in the message center when the PCM detects a low engine oil condition, the signal circuit is high. The IPC receives a class 2 message from the PCM requesting illumination.