Check Engine Light: Notes
WARNING: This page is about a different car, the 1991 Geo Prizm. However, it is still accessible from the selected car via links, so may be relevant.
All models are equipped with a CHECK ENGINE light, located on the instrument panel. Light comes on, as a bulb check, when ignition switch is turned to the ON position and engine is not running. Light should not flash at this time, and should go out when engine is started.
If CHECK ENGINE light remains on, or flashes, with engine running, the self-diagnostic system has detected a problem. If the problem goes away, light will go out after 10 seconds, but a fault code will be stored in ECM memory.