Conditions for Setting the DTC
WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
P0746
Clutch 1-2-3-4-5-6 = Not applied
P0747
Clutch 1-2-3-4-5-6 = Not released