Action Taken When the DTC Sets: P0977

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0977 is a Type A DTC.
The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the current gear is 4th, 5th, or 6th gear.
The TCM inhibits the torque converter clutch (TCC).
The TCM commands maximum line pressure.
The TCM freezes transmission adaptive functions.