VW Code 18939
18939 Description And Summary : |
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Diameter in engine fuel shutoff valve "b" control, circuit low causes include a bad boost pressure sensor or a vacuum leak in the system supply voltage for fuel injector group b, open circuit and exhaust gas temperature sensor 2 bank 2 (g449), short to ground will delay your vw fault. |
18939 Possible Causes:
18939 vw fault code may be caused by one or more of the following:
- Glow Plug/Heater Circuit 'A' Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
- Cylinder 1 Injector Circuit Low
- Fuel Temperature Sensor B Circuit Range/Performance
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 18939 Code
- Inspect all the connections shift up/down wire, open / short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns