Change Engine Oil Indicator Malfunction

Change Engine Oil Indicator Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using the diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* 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.

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 after completing the diagnostic procedure. Verification Tests

* GM Oil Life System Resetting