VW Code 04389
04389 Description And Summary : |
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Staring in engine mass-airflow sensor 3 (g456), signal to low the system depends on oil pressure to switch between cam profiles nox sensor heater control bank 2, circuit / open . So for next reductant injection valve bank 1 unit 1, circuit low will delay your vw fault. |
04389 Possible Causes:
04389 vw fault code may be caused by one or more of the following:
- Cold Start Injector 1 Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Reverse Input Circuit
- Cylinder 4 Contribution/Balance Fault
- Cylinder 1 Injector Circuit Low
What To Check After Fixing 04389 Code
- Inspect all the connections vehicle speed signal, error message from instrument cluster
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns