The car engine problem may start for various reasons. After testing the car engine, the engine P1618 Code has found what contains some information of the car engine problem and by the meaning, the automobile engineer will take step for solving the car engine. If the exact reason of the car engine problem is found, then fix the reason first and thus you can easily solve the car engine problem. Here, the problem is powertrain and the problem can be fixed easily. If you know how to solve the car engine and you have all things like expensive machines for solving the car engine, you may try to fix the car engine.