Home › Land Rover › 2013 › Range Rover Sport Autobiography › Repair and Diagnosis (Single Page) › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATC) -- Range Rover Sport/L320 › Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATC) › Description And Operation › DTC U3000-87 Control Module - Missing message › Possible Causes