Study the meaning of the engine P0861 Code before solving the car engine. The engine should be fixed with the right meaning of the code. You can easily find the right meaning from the manual of the car engine. You will get some other meanings of the same code but do not use any of those meanings without checking the meaning of the code is relevant with the car and car manufacturer. You can easily learn about the car engine problem if you follow the right meaning of the code and with it, you can fix the car engine but do not use automobile dictionary meaning of the code for fixing the car engine.