Home >> Jaguar >> 2014 >> XF Base >> Repair and Diagnosis (Single Page) >> General Information >> DTC Index >> Diagnostic Trouble Code: Rear Junction Box (RJB) -- XF/X250 >> Diagnostic Trouble Code (DTC) IndexDTC: Rear Junction Box (RJB) >> Description And Operation >> DTC U3000-49: Control Module - Internal electronic failure >> Possible Causes