Actions Taken When the DTC Sets

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0973 = Type A DTC - Additional actions taken:

Grade braking = Disabled
Line Pressure Command = Maximum
Manual Shift Control = Disabled
{ If equipped }Mode Switch = Disabled
{ If equipped }Neutral Idle Mode = Disabled
Powertrain braking = Disabled
Transmission Adaptive Pressure Control = Freeze current adapt values
Transmission gear allowed = Neutral or 2nd Gear

P0974 = Type B DTC - Additional actions taken:

1st Gear = Disabled
{ If equipped }Neutral Idle Mode = Disabled