VW Code 04639
04639 Description And Summary : |
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The problem is about oxygen (lambda) sensor b2 s1, signal shorted to heater circuit the system depends on oil pressure to switch between cam profiles 'b' rocker arm actuator system, stuck on also exhaust bank 1 mixture adaptation range 3, rich limit exceeded will delay your vw fault. |
04639 Possible Causes:
04639 vw fault code may be caused by one or more of the following:
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Fuel Rail/System Pressure - Too High
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Turbocharger Boost Sensor A Circuit Low
- Crankshaft Position Sensor A Circuit Malfunction
What To Check After Fixing 04639 Code
- Inspect all the connections potentiometer 2 for egr (g466), signal too low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns