Action Taken When the DTC Sets
WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P0634 is a Type A DTC.
- TCM limits the transmission to Reverse and 3rd or 5th gear operation.
- TCM inhibits Tap Up/Down function.
- TCM inhibits manual shifting of forward gears.
- TCM inhibits neutral idle.
- TCM commands maximum line pressure.
- TCM requests reduced engine torque.
- TCM shuts down.