Home › Jaguar › 2016 › XJR Base › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code (DTC) Index DTC: Headlamp Leveling Control Module (HLCM) -- XJ/X351 › DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Headlamp Leveling Control Module (HLCM) › Description And Operation › Headlamp Leveling Control Module (HLCM) › B1041-04 Leveling Control - System internal failures › Possible Causes