Change Engine Oil Indicator Malfunction

Change Engine Oil Indicator Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using the diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions) provides an overview of each diagnostic category.

Circuit/System Description

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 this information via serial data to the instrument panel cluster (IPC) which illuminates the CHANGE ENGINE OIL indicator. The IPC will illuminate the CHANGE ENGINE OIL indicator when the oil needs to be changed.

Reference Information
Schematic Reference

Instrument Cluster Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views ()
Electrical Information Reference

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Control Module References) for scan tool information

Circuit/System Verification

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.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* GM Oil Life System Resetting (Service and Repair)
* Control Module References (Control Module References) for IPC replacement, setup, and programming