Home >> Land Rover >> 2017 >> Range Rover Autobiography >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Seat Module - Driver/Passenger/Rear - Left/Right (DSM/PSM/RSM) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Seat Module - Driver / Passenger / Rear - Left / Right (DSM / PSM / RSM) >> Description And Operation >> DTC B14FD-31: Bank 'A' Motor #3 Speed/Position Sensor - No signal >> Possible Causes