DTC U2109-91: Back-up Battery - Parametric: Action
WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 Jaguar XE. 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 module internal battery must be installed before this DTC can be cleared
- Install a new telematics control unit internal battery, Using the Jaguar Land Rover approved diagnostic equipment, clear the DTCs and retest