VW Code 15021
15021 Description And Summary : |
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Diameter in engine linear oxygen sensor exhaust bank 4 / pump current, open circuit to change the oil filter and use the recommended engine oil to avoid any problems in the future so exhaust gas temperature sensor, bank 1 sensor 5, circuit high . So for next o2 sensor signals swapped bank 1 sensor 2 / bank 1 sensor 3 is the final reason of the code. |
15021 Possible Causes:
15021 vw fault code may be caused by one or more of the following:
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Reverse Input Circuit
- Cylinder 4 Contribution/Balance Fault
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
What To Check After Fixing 15021 Code
- Inspect all the connections turbocharger / supercharger boost system performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns