DTC P0850-02: Park/Neutral Switch Input Circuit - General signal failure: Action

WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, 2016 Land Rover Range Rover, 2014 Land Rover Range Rover, and 2013 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.

Refer to the appropriate system wiring diagram and check the park/neutral signal circuit for short circuit to ground, short circuit to power, open circuit, high resistance. Repair the wiring harness as necessary
Using the Jaguar Land Rover approved diagnostic equipment, check the transmission control switch for related DTCs and refer to the relevant DTC index