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.

P2728

P2728 is a Type C DTC.
TCM freezes transmission adaptive functions on the 1-2-3-4 clutch.

P2729

P2729 is a Type A DTC.
TCM commands the high side driver OFF.
TCM forces the torque converter clutch OFF.
TCM limits the transmission to 4th gear and reverse.
TCM commands maximum line pressure.
TCM freezes transmission adaptive functions.
TCM inhibits Tap Up/Tap Down.
TCM inhibits manual up, manual down with the shift selector.
TCM inhibits neutral idle.
TCM inhibits powertrain braking.

P2730

P2730 is a Type A DTC.
TCM limits the transmission to reverse and 4th gear.
TCM inhibits powertrain braking.
TCM inhibits neutral idle.
TCM inhibits Tap Up/Tap Down function.
TCM inhibits manual shifting of forward gears.
TCM commands maximum line pressure.
TCM freezes transmission adaptive functions.