Home >> Jaguar >> 2022 >> F-Pace Base >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index - DTC: TELEMATIC Control Module (TCU) -- F-Pace/X761 >> Diagnostic Trouble Code Index - DTC: TELEMATIC Control Module (TCU) (G2723514) >> Description And Operation >> TELEMATIC Control Module (TCU) >> DTC U2109-91: Back-up Battery - Parametric >> Possible Causes