Action Taken When DTC Sets

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

The PCM does not illuminate the malfunction indicator lamp (MIL).
The PCM commands maximum line pressure.
The PCM freezes transmission adaptive functions.
The PCM assumes D4 for shifting.
The PCM records the operating conditions when the "Conditions for Setting the DTC" are met. The PCM stores this information as Failure Records.
The PCM stores DTC P1823 in PCM history.