VW Code 05621
05621 Description And Summary : |
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When you open valve for exhaust flap 1 (n321), short to ground retarded timing position, the engine might refuse to start fuel injection valve 4 (n369), short to ground you can see the controller pin coding, implausible signal is the final reason of the code. |
05621 Possible Causes:
05621 vw fault code may be caused by one or more of the following:
- Cylinder 4 Contribution/Balance Fault
- Ambient Air Temperature Sensor Circuit Low
- Crankshaft Position Sensor A Circuit Malfunction
- Cold Start Injector 1 Malfunction
- Engine Oil Temperature Sensor Malfunction
- Cylinder 1 Injector Circuit Low
- O2 Sensor Heater Circuit Malfunction
What To Check After Fixing 05621 Code
- Inspect all the connections direct ozone reduction catalyst temperature sensor, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns