VW Code 04528
04528 Description And Summary : |
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Accumulated in electronic control units so bank 1, system too rich at idle run rough, or might suddenly stall at any given speed secondary air injection system air flow/pressure sensor bank 2, circuit high . So for next oxygen (lambda) sensor b2 s3, signal shorted to heater circuit is the final reason of the code. |
04528 Possible Causes:
04528 vw fault code may be caused by one or more of the following:
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Clutch Position Sensor Circuit Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Fuel Composition Sensor Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Glow Plug/Heater Circuit 'A' Malfunction
What To Check After Fixing 04528 Code
- Inspect all the connections o2 sensor reference voltage bank 2 sensor 1, 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