Home › Jaguar › 2014 › XF Base › Repair and Diagnosis › Accessories & Equipment › Cruise Control Systems › Diagnostic Trouble Code: Adaptive Speed Control Module (ASCM) -- XF/X250 › Diagnostic Trouble Code (DTC) Index DTC: Adaptive Speed Control Module (ASCM) › Description And Operation › DTC U0300-55: Internal Control Module Software Incompatibility - Not configured › Possible Causes