Action Taken When DTC Sets

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, and 2002 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

For California emission equipped vehicles, the PCM illuminates the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the Conditions for Setting DTC are met. For Non-California emission equipped vehicles, the MIL is not illuminated.
The PCM commands maximum line pressure.
The PCM freezes the shift adapts.
The PCM defaults a calculated output speed value by using the AT ISS values.
The PCM records the operating conditions when the Conditions for Setting DTC are met. The PCM stores this information as Freeze Frame, California only, and Failure Records, California and Federal.
The PCM stores the DTC P0502 in PCM history during the second consecutive trip, California, or the first trip, Federal, in which the Conditions for Setting DTC are met.