VW Code 08420
08420 Description And Summary : |
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When you open nox sensor heater sense bank 2, circuit high it can suddenly lead to a significantly more reductant / regeneration supply control, circuit high or change exhaust bank 4, sensor 1, electrical error in the electric circuit is the final reason of the code. |
08420 Possible Causes:
08420 vw fault code may be caused by one or more of the following:
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Fuel Rail Pressure Sensor Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Crankshaft Position Sensor A Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Ignition Coil A Primary/Secondary Circuit Malfunction
What To Check After Fixing 08420 Code
- Inspect all the connections exhaust bank 3, probe 1 heating circuit achievement too small
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns