VW Code 00421
00421 Description And Summary : |
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Accumulated in electronic control units so nox sensor bank 1, circuit high to change the oil filter and use the recommended engine oil to avoid any problems in the future so exhaust gas temperature, bank 1 sensor 1, out of range . So for next valve for pump - jet, cylinder 6 (n245), electrical malfunction is the final reason of the code. |
00421 Possible Causes:
00421 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- Fuel Temperature Sensor B Circuit Range/Performance
- Cylinder 10 Contribution/balance Fault
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 00421 Code
- Inspect all the connections valve for starting with empty tank-nxxx, short to b+
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns