Action Taken When the DTC Sets
WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
- P0634 is a Type A DTC.
- TCM limits the transmission to 4th gear and reverse.
- TCM inhibits Tap Up/Down function.
- TCM inhibits manual shifting of forward gears.
- TCM enables torque management.
- TCM shuts down.
- TCM commands maximum line pressure.