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.

The AF ECM will switchover to gasoline fuel operation. The AF ECM will not attempt alternative fuel operation until the next ignition key cycle.

The AF ECM will illuminate the MIL and store the DTC as History during 1 drive trip in which the diagnostic runs and fails.
The AF ECM will record operating conditions at the time the DTC sets. This information will be stored as Freeze Frame data.