DTC P176B-71: Transmission Range Selector Up and Down Position Control Error - Actuator stuck: Action

WARNING: This page is about a different car, the 2016 Land Rover LR4, 2015 Land Rover LR4, and 2014 Land Rover LR4. However, it is still accessible from the selected car via links, so may be relevant.

Check for evidence of obstruction or abuse and rectify as appropriate
Using the manufacturer approved diagnostic system check and install the latest relevant level of software to the transmission control switch
Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, install a new transmission control switch