Home >> Land Rover >> 2017 >> Range Rover Autobiography >> Repair and Diagnosis >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code Index DTC: Tailgate Control Module (TGCM) - Upper/Lower -- Range Rover/L405 >> Diagnostic Trouble Code Index DTC: Tailgate Control Module (TGCM) - Upper / Lower >> Description And Operation >> DTC U3000-4B: Control Module - Over temperature >> Possible Causes