Action Taken When the DTC Sets

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

P2817

P2817 is a Type A DTC.
TCM disables transmission adapts learning and freezes current adapt values.
TCM commands default shift pattern and ignores all other shift requests.
TCM inhibits Tap Up/Tap Down.
TCM inhibits TCC.
TCM requests the ECM to disable powertrain braking.
TCM requests the ECM to disable neutral idle.
TCM requests the ECM to disable auto grade braking.
TCM requests the ECM to disable auto stop function.
Transmission shifts to 3rd gear.
Transmission reverse gear is available.

P2818

P2818 is a Type B DTC.
TCM disables transmission adapts learning and freezes current adapt values.
TCM inhibits TCC.