For 1990-2009 cars

### Description

The PCM monitors various engine parameters to determine when an oil change should be done. The PCM sends a message to the Instrument Panel Cluster (IPC) when an oil change is needed. The PCM monitors the following to determine when an oil change should occur:

• | Engine Speed

• | Engine coolant temperature

• | Engine load

• | Intake Air Temperature

• | Vehicle mileage

### Resetting The Oil Life Monitor

Important:

• | Repair any TP sensor DTCs before proceeding with the reset procedure.

• | If the Engine Oil Life Monitor is reset due to a PCM replacement, advise the customer . The customer has two options:

- | Change the engine oil and filter.

- | Determine when the last engine oil change occurred. Monitor the vehicle mileage and change the engine oil and filter at the next recommended service interval.

1. Turn ON the ignition leaving the engine OFF.
2. Cycle the accelerator pedal from a closed throttle to a wide open throttle (WOT) 3 times within 5 seconds. The Change Oil message flashes for 5 seconds when reset.
3. Change the engine oil and filter. Refer to Engine Oil and Oil Filter Change in Engine Mechanical.