Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

The TCM does not request the ECM to illuminate the malfunction indicator lamp (MIL).
HIGH TRANS TEMP message displays on the driver information center (DIC), if equipped.
The TCM freezes transmission adapt functions.
The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.
The TCM stores DTC P0218 in TCM history.