Home › Land Rover › 2016 › LR4 Base › Repair and Diagnosis (Single Page) › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATC) -- LR4/L319 › Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATC) › Description And Operation › DTC U3000-87: Control Module - Missing message › Possible Causes