VW Code 00420
00420 Description And Summary : |
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Staring in engine o2 sensor negative current control bank 1 sensor 1, circuit high it can suddenly lead to a significantly more fuel injection valve 3 (n368), short to b+ . So for next hydraulic pressure sensor 1, too high is the final reason of the code. |
00420 Possible Causes:
00420 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Malfunction
- Cold Start Injector 1 Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
- Reverse Input Circuit
- Turbocharger Boost Sensor A Circuit Low
- Cylinder 1 Injector Circuit Low
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 00420 Code
- Inspect all the connections linear oxygen sensor exhaust bank 4 / common ground wire, open circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns