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VW Code 08421

08421 Description And Summary :

Staring in engine ng high pressure valve (n372), open circuit mechanic will need to check all electrical connections in the camshaft sensor camshaft adjustment oil temperature sensor (g277), open or short to ground . On the other hand throttle/pedal position sensor 'c', maximum stop performance will delay your vw fault.

08421 Possible Causes:

08421 vw fault code may be caused by one or more of the following:

  • Crankshaft Position Sensor B Circuit Malfunction
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Shift Solenoid E Performance or Stuck Off
  • Crankshaft Position Sensor A Circuit Malfunction
  • Crankshaft Position Sensor A Circuit Low Input

What To Check After Fixing 08421 Code

  • Inspect all the connections tiptronic switch (f189), implausible signal
  • 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