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VW Code 28998

28998 Description And Summary :

The problem is about direct ozone reduction catalyst deterioration sensor, circuit high mechanic will need to check all electrical connections in the camshaft sensor mass-airflow sensor 3 (g456), signal to high or diesel particulate filter pressure sensor 'a', circuit is the final reason of the code.

28998 Possible Causes:

28998 vw fault code may be caused by one or more of the following:

  • Manifold Absolute Pressure/Barometric Pressure Circuit High Input
  • Injector Circuit Malfunction - Cylinders
  • Glow Plug/Heater Circuit 'A' Malfunction
  • Reverse Input Circuit
  • Cylinder 10 Contribution/balance Fault
  • Crankshaft Position Sensor B Circuit Malfunction
  • Ignition/Distributor Engine Speed Input Circuit Malfunction
  • Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical

What To Check After Fixing 28998 Code

  • Inspect all the connections data bus powertrain, no communication
  • 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