Home >> Land Rover >> 2015 >> LR4 HSE, AWD >> Repair and Diagnosis >> General Information >> DTC Index >> Diagnostic Trouble Code Index DTC: Driver/Passenger Seat Module (DSM/PSM) -- LR4/L319 >> Diagnostic Trouble Code Index DTC: Driver/Passenger Seat Module (DSM/PSM) >> Description And Operation >> DTC B1B87-31: Seat Height Motor Speed/Position Sensor - No signal >> Possible Causes