Home › Jaguar › 2017 › XF S, AWD › Repair and Diagnosis › Quick Lookups › DTC Index › Diagnostic Trouble Code Index DTC: Suspension Control Module (ISCM) -- XF/X260 › Diagnostic Trouble Code Index DTC: Suspension Control Module (ISCM) › Description And Operation › Suspension Control Module (ISCM) › DTC U201A-54: Control Module Main Calibration Data - Missing calibration › Possible Causes