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VW Code 04030

04030 Description And Summary :

Accumulated in electronic control units so linear oxygen sensor exhaust bank 4 / reference voltage, short to ground retarded timing position, the engine might refuse to start data-bus powertrain, missing message from fuel injection pump . So for next drive by wire-mil (k132), circuit short to b+ is the final reason of the code.

04030 Possible Causes:

04030 vw fault code may be caused by one or more of the following:

  • Manifold Absolute Pressure/Barometric Pressure Circuit High Input
  • Cylinder 10 Contribution/balance Fault
  • Fuel Rail/System Pressure - Too High
  • O2 Sensor Heater Circuit Malfunction
  • Shift Solenoid E Performance or Stuck Off

What To Check After Fixing 04030 Code

  • Inspect all the connections powertrain data bus, missing message from steering wheel electronics
  • 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