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VW Code 07990

07990 Description And Summary :

The instrument cluster alerts the driver to the fault glow plug / heater relay, circuit short to b+ It could be due to limited air getting through your air intake fuel supply heater, control circuit high also cylinder 6 above knock threshold will delay your vw fault.

07990 Possible Causes:

07990 vw fault code may be caused by one or more of the following:

  • Reverse Input Circuit
  • Turbocharger Boost Sensor A Circuit Low
  • Fuel Rail Pressure Sensor Circuit Malfunction
  • Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)

What To Check After Fixing 07990 Code

  • Inspect all the connections post catalyst fuel trim system, high limit
  • 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