Malfunction Indicator Lamp (MIL) Indicator
WARNING: This page is about a different car, the 2002 Chevrolet Monte Carlo, 2002 Chevrolet Impala, 2001 Chevrolet Monte Carlo, and 2001 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
PCM illuminates MIL (SERVICE VEHICLE SOON or CHECK engine) when following occurs:
- PCM detects a malfunction in emissions system.
- PCM performs displays test at start of each ignition cycle. Indicator illuminates for approximately 3 seconds when ignition switch is in RUN position.