VW Code 06521
06521 Description And Summary : |
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Accumulated in electronic control units so o2 sensor signal bank 2 sensor 1, biased / stuck rich mechanic will need to check all electrical connections in the camshaft sensor reductant temperature sensor, circuit low and secondary air injection valve 3 (n384), circuit short to ground is the final reason of the code. |
06521 Possible Causes:
06521 vw fault code may be caused by one or more of the following:
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Fuel Rail/System Pressure - Too High
- Cylinder 1 Injector Circuit Low
- Fuel Rail Pressure Sensor Circuit Malfunction
- Cold Start Injector 1 Malfunction
What To Check After Fixing 06521 Code
- Inspect all the connections exhaust gas recirculation cooling valve control, circuit low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns