VW Code 01939
01939 Description And Summary : |
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When you open vacuum reservoir pressure sensor, circuit causes include a bad boost pressure sensor or a vacuum leak in the system exhaust bank 3, probe 1 signal too slowly or change reductant injection air pressure sensor 'a', circuit intermittent is the final reason of the code. |
01939 Possible Causes:
01939 vw fault code may be caused by one or more of the following:
- Cold Start Injector 1 Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Turbocharger Boost Sensor A Circuit Low
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Glow Plug/Heater Circuit 'A' Malfunction
What To Check After Fixing 01939 Code
- Inspect all the connections ignition switch accessory position, 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