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VW Code 12939

12939 Description And Summary :

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

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range