DTC U2109-91: Back-up Battery - Parametric: Action

WARNING: This page is about a different car, the 2021 Land Rover Range Rover Sport, 2020 Land Rover Range Rover Sport, and 2019 Land Rover Range Rover Sport. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Following an emergency call or stolen vehicle tracking alert, a new telematic control unit module internal battery must be installed before this DTC can be cleared

Install a new telematic control unit module internal battery. Using the Jaguar Land Rover approved diagnostic equipment, reset the non-rechargeable battery power level following the backup battery replacement process