Home › Land Rover › 2018 › Range Rover Sport Autobiography › Repair and Diagnosis › Steering › Steering Control Systems › Diagnostic Trouble Code Index DTC: Electric Steering Column Lock Control Module (ESCL) -- Range Rover Sport/L494 › Diagnostic Trouble Code Index DTC: Electric Steering Column Lock Control Module (ESCL) › Description And Operation › DTC B100D-51: Column Lock Authorization - Not programmed › Possible Causes