Home >> Land Rover >> 2013 >> Range Rover Sport Autobiography >> Repair and Diagnosis >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: Tailgate Control Module (TGCM) -- Range Rover Sport/L320 >> Diagnostic Trouble Code Index DTC: Tailgate Control Module (TGCM) >> Description And Operation >> DTC B11C4-23: Boot/Trunk Close Button - Signal stuck low >> Possible Causes