Home >> Land Rover >> 2021 >> Defender 110 X >> Repair and Diagnosis (Single Page) >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: Infotainment Gateway Module (IGM) -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Infotainment Gateway Module (IGM) (G2805963) >> Description And Operation >> Infotainment Gateway Module (IGM) >> DTC U2109-11: Back-up Battery - Circuit short to ground >> Possible Causes