VW Code 00639
00639 Description And Summary : |
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Staring in engine nox sensor bank 1, circuit high causes include a bad boost pressure sensor or a vacuum leak in the system intake manifold runner control, circuit / open bank 1 or vehicle speed sensor 'b', range / performance is the final reason of the code. |
00639 Possible Causes:
00639 vw fault code may be caused by one or more of the following:
- Reverse Input Circuit
- Cold Start Injector 1 Malfunction
- Fuel Rail/System Pressure - Too High
- Engine Oil Temperature Sensor Malfunction
- Cylinder 10 Contribution/balance Fault
- Turbocharger Boost Sensor A Circuit Low
What To Check After Fixing 00639 Code
- Inspect all the connections a/c request b, 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