Home › Land Rover › 2015 › LR2 Base › Repair and Diagnosis › Heating, Ventilation & A/C (HVAC) › HVAC Control Systems › Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATC) -- LR2/L359 › Diagnostic Trouble Code Index DTC: Automatic Temperature Control Module (ATC) › Description And Operation › DTC U3000-41: Control Module - General checksum failure › Possible Causes