Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
B396A 01
The liftgate control module detects a short to battery in the liftgate motor control circuits.
B396A 02
The liftgate control module detects a short to ground in the liftgate motor control circuits.
B396A 04
The liftgate control module detects an open/high resistance in the liftgate motor control circuits or an open/high resistance in the terminal 3 X2 B+ circuit