VW Code 18657
18657 Description And Summary : |
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The instrument cluster alerts the driver to the fault secondary air injection system pump bank 2, stuck on It could be due to limited air getting through your air intake bank 2, system too rich at idle you can see the exhaust gas temperature sensor, bank 1 sensor 5, circuit low is the final reason of the code. |
18657 Possible Causes:
18657 vw fault code may be caused by one or more of the following:
- Fuel Temperature Sensor B Circuit Range/Performance
- Crankshaft Position Sensor A Circuit Malfunction
- Cylinder 4 Contribution/Balance Fault
- Fuel Rail Pressure Sensor Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
What To Check After Fixing 18657 Code
- Inspect all the connections exhaust aftertreatment fuel injector 'a', 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