Home >> Land Rover >> 2015 >> Range Rover Autobiography >> Repair and Diagnosis >> Body & Frame >> Towing Systems >> Diagnostic Trouble Code Index DTC: Deployable TOWBAR Control Module (DTCM) -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Deployable TOWBAR Control Module (DTCM) >> Description And Operation >> DTC B1556-12: Deployable Side Step Button - Circuit short to battery >> Possible Causes