MIL Operation
WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
Malfunction Indicator Light (MIL) is located on the instrument panel and is displayed as CHECK ENGINE or SERVICE ENGINE SOON light.
MIL Function
- MIL informs the driver that a malfunction has occurred and the vehicle should be taken in for service as soon as possible.
- MIL illuminates during a bulb test and a system test.
- A DTC will be stored if a MIL is requested by the diagnostic.
MIL Illumination
- MIL will illuminate with ignition ON and engine not running.
- MIL will turn OFF when engine is started.
- MIL will remain ON if self-diagnostic system has detected a malfunction.
- MIL may turn OFF if malfunction is not present.
- If MIL is illuminated and then engine stalls, the MIL will remain illuminated so long as the ignition switch is ON.
- If MIL is not illuminated and engine stalls, the MIL will not illuminate until ignition switch is cycled OFF, then ON.