VW Code 04278
04278 Description And Summary : |
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When you open intake manifold runner control, lower stop not reached the system depends on oil pressure to switch between cam profiles ignition coil 'g' primary control, short to plus . So for next low pressure fuel system sensor (g410), circuit low will delay your vw fault. |
04278 Possible Causes:
04278 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Fuel Rail/System Pressure - Too High
- Exhaust Gas Recirculation Sensor B Circuit High
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
What To Check After Fixing 04278 Code
- Inspect all the connections reductant injection air pump control, circuit / open
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns