Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. 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).
HIGH TRANS TEMP message displays on the driver information center (DIC).
The PCM freezes transmission adapt functions.
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 P0218 in PCM history.