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VW Code 04528

04528 Description And Summary :

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

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range