This engine P0839 Code lets us know about the car engine problem. When you have the right meaning of the code, you can fix the car engine. You need also use tools and expertise for solving the car engine. The car engine can be fixed by yourself if you have some hand tools. Do not drive the car if you have not fixed the car engine yet. The car engine should be fixed by proper information according to the car manufacturer. You need to solve the car engine properly. The powertrain problem can be fixed without changing any part of the car engine.