VW Code 04077
04077 Description And Summary : |
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Staring in engine nox sensor bank 1, circuit causes include a bad boost pressure sensor or a vacuum leak in the system linear oxygen sensor exhaust bank 3 / reference voltage, open circuit or change fuel supply heater, control circuit / open will delay your vw fault. |
04077 Possible Causes:
04077 vw fault code may be caused by one or more of the following:
- Fuel Composition Sensor Circuit Malfunction
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Injector Circuit Malfunction - Cylinders
- Turbocharger Boost Sensor A Circuit Low
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Cylinder 1 Injector Circuit Low
What To Check After Fixing 04077 Code
- Inspect all the connections barometric pressure sensor 'a', circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns