Home >> Land Rover >> 2021 >> Discovery S >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Body Control Module (BCM) -- Discovery/L462 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Body Control Module (BCM) (G2165406) >> DTC B1974-56: Rear View Mirror Module - Invalid/Incompatible Configuration >> Possible Causes