The problem of the car engine can ruin your life and you need to get that meaning of the engine P0791 Code what is provided by the car manufacturer. The car engineer must seek the real meaning before solving the car engine and the automobile engineer will allow the real meaning only until the car engine is ok. The automobile dictionary meaning of the code is not suitable for the car engine and you should be careful when you want to fix the car engine by the automobile dictionary meaning. It is better if you allow an automobile engineer to fix the car engine. The automobile engineer knows well how to fix the car engine.