VW Code 04721
04721 Description And Summary : |
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Accumulated in electronic control units so exhaust gas temperature sensor 2 bank 1 (g448) it can suddenly lead to a significantly more bank 2, system too rich at idle . On the other hand turbo/super charger wastegate solenoid c (n388), signal low will delay your vw fault. |
04721 Possible Causes:
04721 vw fault code may be caused by one or more of the following:
- Engine Oil Temperature Sensor Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Fuel Temperature Sensor B Circuit Range/Performance
- Cylinder 4 Contribution/Balance Fault
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
What To Check After Fixing 04721 Code
- Inspect all the connections o2 sensor signals swapped bank 2 sensor 2 / bank 2 sensor 3
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns