Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.

The PCM will illuminate the malfunction indicator lamp (MIL) during the first trip in which the diagnostic test has been run and failed.
The PCM will turn ON the Service Engine Soon indicator.
The PCM will alternately disable 2 groups of four cylinders by turning OFF the fuel injectors.
The PCM will store conditions which were present when the DTC set as Freeze Frame and File Records data.