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VW Code 04778

04778 Description And Summary :

Diameter in engine o2 sensor negative current control bank 1 sensor 1, circuit / open the system depends on oil pressure to switch between cam profiles vehicle speed signal, circuit open and turbo/super charger, under-boost condition will delay your vw fault.

04778 Possible Causes:

04778 vw fault code may be caused by one or more of the following:

  • Reverse Input Circuit
  • Crankshaft Position Sensor A Circuit Low Input
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
  • Fuel Rail/System Pressure - Too High
  • Fuel Temperature Sensor B Circuit Range/Performance
  • Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical

What To Check After Fixing 04778 Code

  • Inspect all the connections cylinder 9 injector, data incompatible
  • Check the engine oil to ensure it's clean and the viscosity
  • Restart the vehicle and retest to see if the error returns

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range