VW Code 18939
18939 Description And Summary : |
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Diameter in engine evaporative emission system switching valve control, circuit high retarded timing position, the engine might refuse to start friction too high, exhaust cam adjustment bank 1 . So for next valve for pump - jet: cylinder 7 (n303), circuit low input will delay your vw fault. |
18939 Possible Causes:
18939 vw fault code may be caused by one or more of the following:
- Turbocharger Boost Sensor A Circuit Low
- Fuel Rail/System Pressure - Too High
- Cylinder 1 Injector Circuit Low
- Cold Start Injector 1 Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Cylinder 4 Contribution/Balance Fault
What To Check After Fixing 18939 Code
- Inspect all the connections nox sensor heater control bank 1, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns