The engine control module (ECM)/powertrain control module (PCM) determines when the engine oil should be changed and calculates the oil life in percent. The ECM/PCM sends the engine oil life information via the serial data circuit to the instrument panel cluster (IPC). The IPC receives the oil life data from the ECM/PCM and displays the CHANGE ENGINE OIL message as required by the ECM/PCM.

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

Displays and Gages Connector End Views

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

1. Verify the scan tool Engine Oil Life Remaining parameter is greater than 0 percent.

⇒	If equal to 0 percent, reset the engine oil life.

2. If the percent value is normal, replace the IPC.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.