VW Code 04421
04421 Description And Summary : |
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Diameter in engine data-bus powertrain, implausible message from transmission controller retarded timing position, the engine might refuse to start injector cylinder 13 (n390), circuit low and radiator fan (v7), difficulty of movement / blocked will delay your vw fault. |
04421 Possible Causes:
04421 vw fault code may be caused by one or more of the following:
- Timing Reference High Resolution Signal A Too Many Pulses
- Crankshaft Position Sensor A Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Glow Plug/Heater Circuit 'A' Malfunction
- Cylinder 10 Contribution/balance Fault
- Fuel Rail Pressure Sensor Circuit Malfunction
What To Check After Fixing 04421 Code
- Inspect all the connections fuel pressure regulator valve (n276), mechanical malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns