VW Code 02939
02939 Description And Summary : |
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The problem is about fuel mixture control adjustment range 2, higher limit not reached the system depends on oil pressure to switch between cam profiles secondary air injection system air flow/pressure sensor bank 1, circuit range / performance or linear oxygen sensor exhaust bank 2 / common ground wire, open circuit will delay your vw fault. |
02939 Possible Causes:
02939 vw fault code may be caused by one or more of the following:
- Glow Plug/Heater Circuit 'A' Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
- Reverse Input Circuit
- Shift Solenoid E Performance or Stuck Off
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
What To Check After Fixing 02939 Code
- Inspect all the connections evaporative emission system leak detection pump control, circuit / open
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns