Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

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