MIL Operation (Function)

WARNING: This page is about a different car, the 2003 Saturn LW200 and 2003 Saturn L200. However, it is still accessible from the selected car via links, so may be relevant.

MIL is located on the instrument panel and is displayed as CHECK ENGINE light.

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.