The problem of the engine can be very terrible problem and by the diagnosis the car engine, it is possible to know more information about the car engine problem. The problem of the car engine is very serious and from the engine P0551 Code, you can know detail of the car engine problem. Do not drive the car with the car engine problem. You should not let anyone to solve the car engine without expert automobile engineer. The automobile dictionary meaning of the code is not sufficient for solving the car engine. That is why, skill person is necessary to find the right meaning of the code and solve the car engine problem.