Action Taken When the DTC Sets

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

P0601, P0604

DTCs P0601, P0604 are Type A DTCs.
The TCM commands soft landing to second gear.
The TCM commands maximum line pressure.
The TCM forces the TCC OFF.
The TCM freezes transmission adaptive functions.

P0602, P0603, P062F

DTCs P0602, P0603, P062F is a Type A DTCs.
The TCM commands immediate landing to second gear.
The TCM commands maximum line pressure.
The TCM forces the TCC OFF.
The TCM freezes transmission adaptive functions.