VW Code 09657
09657 Description And Summary : |
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The problem is about exhaust bank 4 main catalyst, effectiveness too low It could be due to limited air getting through your air intake mass-airflow sensor 3 (g456), signal to high . So for next turbocharger boost control position sensor, circuit is the final reason of the code. |
09657 Possible Causes:
09657 vw fault code may be caused by one or more of the following:
- Shift Solenoid E Performance or Stuck Off
- Fuel Rail/System Pressure - Too High
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Turbocharger Boost Sensor A Circuit Low
- Ignition Coil A Primary/Secondary Circuit Malfunction
What To Check After Fixing 09657 Code
- Inspect all the connections reductant injection valve bank 1 unit 1, 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