Home >> Land Rover >> 2021 >> Range Rover Base >> Repair and Diagnosis >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index DTC: Tailgate Control Module (TGCM) -- Range Rover/L405 >> General Information >> Description And Operation >> Diagnostic Trouble Code Index - DTC: Tailgate Control Module (TGCM) - Upper/Lower (G2016287) >> DTC B11C4-23: Boot/Trunk Close Button - Signal stuck low >> Possible Causes