Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. 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 signal the IPC to turn ON the Service Engine Soon indicator.
The PCM will alternately disable 2 groups of 4 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.