Home >> Jaguar >> 2014 >> XF Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Diagnostic Trouble Code Index DTC: Engine Control Module (ECM) GTDI 2.0L Petrol -- XF/X250 >> Diagnostic Trouble Code (DTC) Index DTC: GTDI 2.0L Petrol DTC: Engine Control Module (ECM) >> Description And Operation >> DTC P050F-01: Brake Assist Vacuum Too Low - General Electrical Failure >> Possible Causes