Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2008 GMC Sierra and 2008 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

P0742

DTC P0742 is a Type B DTC.
The TCM commands maximum line pressure.
The TCM freezes transmission adaptive functions.

P0752

DTC P0752 is a Type B DTC.
The TCM commands maximum line pressure.
The TCM freezes transmission adaptive functions.
The TCM inhibits 3-2 downshifts if the vehicle speed is greater than 20 km/h (12.4 mph).

P0757

DTC P0757 is a Type A DTC.
The TCM commands maximum line pressure.
The TCM freezes transmission adaptive functions.
The TCM inhibits 4th gear.