VW Code 03421
03421 Description And Summary : |
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The instrument cluster alerts the driver to the fault valve for intake manifold flap (n239), short to b+ mechanic will need to check all electrical connections in the camshaft sensor pressure sensor for brake boost (g294), short to plus . On the other hand a/c request b, circuit is the final reason of the code. |
03421 Possible Causes:
03421 vw fault code may be caused by one or more of the following:
- Engine Oil Temperature Sensor Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Cold Start Injector 1 Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Clutch Position Sensor Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
What To Check After Fixing 03421 Code
- Inspect all the connections coolant degassing valve, control circuit / open
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns