Diagnostic Aids

WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, 2002 Chevrolet Monte Carlo, and 2002 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

Inspect for the following conditions:

If engine runs okay, inspect for a malfunctioning MIL, an open in MIL control circuit, or an open in the instrument cluster ignition feed.
If the engine cranks but will not run, inspect for an open PCM ignition or battery feed or a faulty PCM to engine ground.
PCM and engine grounds for clean and secure connections