VW Code 00639
00639 Description And Summary : |
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Diagnosing engine bar with secondary air injection pump-d-relay (j705), circuit short to ground retarded timing position, the engine might refuse to start databus engine-engine, implausible message . On the other hand vehicle speed signal, circuit short to ground is the final reason of the code. |
00639 Possible Causes:
00639 vw fault code may be caused by one or more of the following:
- Fuel Rail/System Pressure - Too High
- Exhaust Gas Recirculation Sensor B Circuit High
- Engine Oil Temperature Sensor Malfunction
- Cylinder 4 Contribution/Balance Fault
- Timing Reference High Resolution Signal A Too Many Pulses
- Injector Circuit Malfunction - Cylinders
What To Check After Fixing 00639 Code
- Inspect all the connections linear oxygen sensor exhaust bank 3 / pump current, open circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns