Action Taken When DTC Sets

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

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