VW Code 09991
09991 Description And Summary : |
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Accumulated in electronic control units so injector control pressure sensor, circuit low the system depends on oil pressure to switch between cam profiles relays for pump, fuel cooling (j445), interruption/short-circuit after mass . On the other hand exhaust gas temperature sensor bank 1 sensor 2, circuit range / performance will delay your vw fault. |
09991 Possible Causes:
09991 vw fault code may be caused by one or more of the following:
- Fuel Rail Pressure Sensor Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Cold Start Injector 1 Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
- Reverse Input Circuit
- Glow Plug/Heater Circuit 'A' Malfunction
What To Check After Fixing 09991 Code
- Inspect all the connections turbocharger / supercharger boost pressure not detected - mechanical
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns