Change Engine Oil Indicator Always On

Change Engine Oil Indicator Always On

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

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 the serial data circuit to the instrument panel cluster (IPC). The IPC receives the oil life data from the ECM/PCM and displays the oil level percent in the IPC. The IPC displays the CHANGE ENGINE OIL message 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
* Refer to Programming and Relearning for PCM or IPC replacement, setup, and programming. Programming and Relearning