VW Code 18639
18639 Description And Summary : |
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The instrument cluster alerts the driver to the fault reductant injection air pressure sensor 'a', circuit intermittent it can suddenly lead to a significantly more transmission ratio, implausible and wait then engine coolant temperature signal, short to ground will delay your vw fault. |
18639 Possible Causes:
18639 vw fault code may be caused by one or more of the following:
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
- Cylinder 1 Injector Circuit Low
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
What To Check After Fixing 18639 Code
- Inspect all the connections turbocharger boost control position sensor, 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