VW Code 00021
00021 Description And Summary : |
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This code were stamped on VW Engine case ignition coil 'a' primary control, circuit low it can suddenly lead to a significantly more ignition switch accessory position, circuit . So for next nox sensor heater sense bank 1, circuit high is the final reason of the code. |
00021 Possible Causes:
00021 vw fault code may be caused by one or more of the following:
- Fuel Composition Sensor Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Fuel Rail/System Pressure - Too High
- Exhaust Gas Recirculation Sensor B Circuit High
- Clutch Position Sensor Circuit Malfunction
What To Check After Fixing 00021 Code
- Inspect all the connections o2 sensor signal bank 1 sensor 2, biased / stuck lean
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns