VW Code 00991
00991 Description And Summary : |
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This code were stamped on VW Engine case fuel pump "b" control, circuit / open It could be due to limited air getting through your air intake exhaust bank 3, probe 1 heating circuit short-circuit after pluses . On the other hand auxiliary engine coolant (ec) pump relay (j496), open or short to ground is the final reason of the code. |
00991 Possible Causes:
00991 vw fault code may be caused by one or more of the following:
- Engine Shutoff Solenoid Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Injector Circuit Malfunction - Cylinders
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Crankshaft Position Sensor A Circuit Low Input
What To Check After Fixing 00991 Code
- Inspect all the connections o2 sensor reference voltage bank 2 sensor 1, 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