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

WARNING: This page is about a different car, the 2018 Land Rover Discovery Sport, 2017 Land Rover Discovery Sport, 2016 Land Rover Discovery Sport, and 2015 Land Rover Discovery 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 telematics control module internal battery must be installed before this DTC can be cleared

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