Home › Land Rover › 2020 › Discovery Sport Base › Repair and Diagnosis › General Information › Specifications Index › Diagnostic Trouble Code Index DTC: HVAC Control Module (HVAC) - Discovery Sport/L550 › Diagnostic Trouble Code Index - DTC: HVAC Control Module (HVAC) (G2301203) › Description And Operation › DTC U3000-04: Control Module - System internal failures › Possible Causes