Home >> Jaguar >> 2017 >> XJR Base >> Repair and Diagnosis (Single Page) >> Quick Lookups >> DTC Index >> Diagnostic Trouble Code (DTC) Index DTC: Gateway Module -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: Gateway Module >> Description And Operation >> Gateway Module (GWM) >> U0300-46 Internal Control Module Software Incompatibility - Calibration/parameter memory failure >> Possible Causes