VW Code 09021
09021 Description And Summary : |
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Accumulated in electronic control units so engine coolant level sensor / switch, circuit high It could be due to limited air getting through your air intake exhaust bank 4, sensor 2, signal too slowly also data bus powertrain, missing message for central electric controller is the final reason of the code. |
09021 Possible Causes:
09021 vw fault code may be caused by one or more of the following:
- Ambient Air Temperature Sensor Circuit Low
- Fuel Temperature Sensor B Circuit Range/Performance
- Shift Solenoid E Performance or Stuck Off
- Timing Reference High Resolution Signal A Too Many Pulses
- Fuel Rail Pressure Sensor Circuit Malfunction
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Cylinder 10 Contribution/balance Fault
What To Check After Fixing 09021 Code
- Inspect all the connections data bus powertrain, missing messages
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns