VW Code 04277
04277 Description And Summary : |
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When you open hc adsorption catalyst efficiency below threshold bank 2 It could be due to limited air getting through your air intake oxygen (lambda) sensor b4 s1, heater return coupling . So for next direct ozone reduction catalyst temperature sensor, circuit low will delay your vw fault. |
04277 Possible Causes:
04277 vw fault code may be caused by one or more of the following:
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Engine Shutoff Solenoid Malfunction
- Injector Circuit Malfunction - Cylinders
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Turbocharger Boost Sensor A Circuit Low
- Fuel Composition Sensor Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
What To Check After Fixing 04277 Code
- Inspect all the connections o2 sensor signal bank 2 sensor 3, biased / stuck rich
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns