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VW Code 04321

04321 Description And Summary :

Accumulated in electronic control units so exhaust gas temperature sensor, bank 1 sensor 5, circuit high the system depends on oil pressure to switch between cam profiles ignition switch accessory position, circuit low or 'a' rocker arm actuator control, circuit / open will delay your vw fault.

04321 Possible Causes:

04321 vw fault code may be caused by one or more of the following:

  • Crankshaft Position Sensor A Circuit Low Input
  • Cylinder 1 Injector Circuit Low
  • Injector Circuit Malfunction - Cylinders
  • Clutch Position Sensor Circuit Malfunction
  • Glow Plug/Heater Circuit 'A' Malfunction
  • Cylinder 4 Contribution/Balance Fault

What To Check After Fixing 04321 Code

  • Inspect all the connections throttle/pedal position sensor / switch 'e', circuit intermittent
  • 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