VW Code 10021
10021 Description And Summary : |
|---|
When you open o2 sensor reference voltage bank 2 sensor 1, circuit / open causes include a bad boost pressure sensor or a vacuum leak in the system data bus powertrain, missing message from instruments panel ecu you can see the ignition switch run/start position, circuit high will delay your vw fault. |
10021 Possible Causes:
10021 vw fault code may be caused by one or more of the following:
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Cold Start Injector 1 Malfunction
- O2 Sensor Heater Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Reverse Input Circuit
- Cylinder 4 Contribution/Balance Fault
- Engine Shutoff Solenoid Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
What To Check After Fixing 10021 Code
- Inspect all the connections exhaust bank 3, probe 1 heating circuit interruption
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns