DTC P085D-97: Gear Shift Control Module "A" Performance - Component or system operation obstructed or blocked: Action

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, 2016 Land Rover Range Rover, 2015 Land Rover Range Rover, and 2014 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.

Check the operation of the transmission control switch and ensure nothing is jamming or obstructing the mechanism. Rectify as necessary
Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and perform routine - On Demand Self Test. If the fault persists, install a new transmission control switch