The car engine P1791 Code is an important thing for the automobile engineer knows the importance of the car engine problem. The meaning of the engine code tells about the car engine problem and helps the automobile engineer to fix the car engine. You do not need to try to solve the car engine if you are not perfect for this position in this work. You must engage an expert or an automobile engineer who knows well how to solve the car engine. The automobile engineer will use all necessary tools and machines for solving the car engine and he must has expertise.