Theory Of Operation
WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic determines if the Park Lock is not engaged in the PARK position when it should be.
The Transmission Control Module (TCM) will not allow Park Lock engagement when the vehicle is moving regardless of whether the Shift Selector is in the PARK position.