VW Code 12939
12939 Description And Summary : |
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This code were stamped on VW Engine case exhaust bank 3, probe 2 heating circuit short-circuit after mass to change the oil filter and use the recommended engine oil to avoid any problems in the future so linear oxygen sensor exhaust bank 4 / common ground wire, short to ground and activation glow plug control module, electrical malfunction is the final reason of the code. |
12939 Possible Causes:
12939 vw fault code may be caused by one or more of the following:
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Timing Reference High Resolution Signal A Too Many Pulses
- Ambient Air Temperature Sensor Circuit Low
- Shift Solenoid E Performance or Stuck Off
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Turbocharger Boost Sensor A Circuit Low
What To Check After Fixing 12939 Code
- Inspect all the connections powertrain data bus, missing message from steering angle sensor
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns