VW Code 03931
03931 Description And Summary : |
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The problem is about evaporative emission system switching valve control, circuit low run rough, or might suddenly stall at any given speed diesel particulate filter pressure sensor 'b', circuit high and fuel pump, mechanical malfunction is the final reason of the code. |
03931 Possible Causes:
03931 vw fault code may be caused by one or more of the following:
- Fuel Temperature Sensor B Circuit Range/Performance
- Ambient Air Temperature Sensor Circuit Low
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Crankshaft Position Sensor A Circuit Low Input
- Cylinder 4 Contribution/Balance Fault
- O2 Sensor Heater Circuit Malfunction
- Cylinder 1 Injector Circuit Low
What To Check After Fixing 03931 Code
- Inspect all the connections particulate trap bank 2, efficiency below threshold
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns