Home >> Jaguar >> 2015 >> XK 2D Convertible >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Driver/Passenger Front Seat Module (DSM/PSM) -- XK/X150 >> Diagnostic Trouble Code Index DTC: Driver/Passenger Front Seat Module (DSM/PSM) >> Description And Operation >> Driver/Passenger Seat Module [DSM/PSM] >> DTC B1138-13: Lumbar control C - Circuit open >> Possible Causes