VW Code 07990
07990 Description And Summary : |
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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