Actions Taken When DTC Sets

WARNING: This page is about a different car, the 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

AF ECM will not illuminate the MIL.
AF ECM will store the DTC as History during ONE drive trip in which the diagnostic runs and fails.
AF ECM will record operating conditions at the time the DTC sets. This information will be stored as Freeze Frame data.