Home >> Land Rover >> 2017 >> Discovery SE >> Repair and Diagnosis >> Steering >> Steering Control Systems >> Diagnostic Trouble Code Index DTC: Electric Steering Column Lock Control Module (ESCL) -- Discovery/L462 >> Diagnostic Trouble Code Index DC: Electric Steering Column Lock Control Module (ESCL) >> Description And Operation >> DTC B100D-29: Column Lock Authorization - Signal Invalid >> Possible Causes