VW Code 04578
04578 Description And Summary : |
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This code were stamped on VW Engine case o2 sensor signal bank 1 sensor 2, biased / stuck lean the system depends on oil pressure to switch between cam profiles oxygen (lambda) sensor b2 s1, pump current, short to b+ also direct ozone reduction catalyst deterioration sensor, circuit intermittent / erratic will delay your vw fault. |
04578 Possible Causes:
04578 vw fault code may be caused by one or more of the following:
- Clutch Position Sensor Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Ignition Coil A Primary/Secondary Circuit Malfunction
- O2 Sensor Heater Circuit Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Engine Shutoff Solenoid Malfunction
- Reverse Input Circuit
- Fuel Composition Sensor Circuit Malfunction
What To Check After Fixing 04578 Code
- Inspect all the connections intake manifold flap; bank 2, stuck open
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns