Home >> Land Rover >> 2021 >> Discovery S >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Driver/Passenger/Rear Seat Module (DSM/PSM/RSM) -- Discovery/L462 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Driver/Passenger/Rear Seat Module (DSM/PSM/RSM) (G2016124) >> DTC B1087-88: LIN Bus "A" - Bus off >> Possible Causes