Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0965, P0966, and P0967 are Type A DTCs. Refer to Diagnostic Trouble Code (DTC) Type Definitions and Diagnostic Trouble Code (DTC) List/Type .
The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based on the fault detected.
The TCM commands maximum line pressure.
The TCM freezes transmission adaptive functions.