Action Taken When DTC Sets

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

PCM illuminates the Malfunction Indicator Light (MIL) during the second consecutive trip in which the Conditions for Setting DTC are met.
PCM commands maximum line pressure.
PCM freezes shift adapts.
PCM calculates vehicle speed from the AT input shaft speed sensor for shift timing.
PCM records the operating conditions when the Conditions for Setting DTC are met. The PCM stores this information as Freeze Frame and Failure Records.
PCM stores DTC P0502 in PCM history during the second consecutive trip in which the Conditions for Setting DTC are met.