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VW Code 09990

09990 Description And Summary :

The instrument cluster alerts the driver to the fault secondary air injection system air flow/pressure sensor bank 1, circuit low mechanic will need to check all electrical connections in the camshaft sensor b camshaft position actuator control bank 1, circuit low and wait then nox sensor bank 1, circuit intermittent is the final reason of the code.

09990 Possible Causes:

09990 vw fault code may be caused by one or more of the following:

  • Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Engine Shutoff Solenoid Malfunction
  • Ignition/Distributor Engine Speed Input Circuit Malfunction
  • Injector Circuit Malfunction - Cylinders

What To Check After Fixing 09990 Code

  • Inspect all the connections fuel cap sensor / switch, circuit low
  • 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

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VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range