Home >> Land Rover >> 2021 >> Defender 90 X >> Repair and Diagnosis (Single Page) >> General Information >> Specifications Index >> Diagnostic Trouble Code Index DTC: Rear HVAC Control Module (RHVAC) - Without Rear Air Conditioning -- Defender/L663 >> Diagnostic Trouble Code Index - DTC: Rear HVAC Control Module (RHVAC) - Without Rear Air Conditioning (G2400911) >> Description And Operation >> Rear Integrated Control Panel (FCIMB) - Without Auxiliary Climate Control >> DTC U2300-55: Central Configuration - Not configured >> Possible Causes