Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The TCM commands maximum line pressure.
The TCM turn OFF all solenoids.
The TCM freezes transmission adaptive functions.
The TCM defaults the transmission to 3rd gear if the current gear is 1st or 2nd gear, or 3rd gear if the current gear is 4th gear.