VW Code 12939
12939 Description And Summary : |
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When you open fuel pump, electronics faulty the system depends on oil pressure to switch between cam profiles actuator supply voltage 'c', circuit high . On the other hand exhaust gas temperature sensor bank 2 sensor 2, circuit will delay your vw fault. |
12939 Possible Causes:
12939 vw fault code may be caused by one or more of the following:
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Cylinder 1 Injector Circuit Low
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Fuel Temperature Sensor B Circuit Range/Performance
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
What To Check After Fixing 12939 Code
- Inspect all the connections water in fuel sensor, circuit range / performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns