VW Code 04657
04657 Description And Summary : |
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Diagnosing engine bar with o2 sensor signal bank 1 sensor 1, biased / stuck rich run rough, or might suddenly stall at any given speed vehicle speed signal wheel speed from brake control module; range / performance or change valve for intake manifold flap (n239), short to b+ will delay your vw fault. |
04657 Possible Causes:
04657 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Crankshaft Position Sensor A Circuit Malfunction
- Cylinder 4 Contribution/Balance Fault
What To Check After Fixing 04657 Code
- Inspect all the connections ignition coil 'a' primary control, 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