The engine P0618 Code is found in many cars engine and you need to use the code for solving the car engine. Do not allow wrong meaning of the code for solving the car engine. The powertrain is the real cause of the engine problem and the engine code is related with that problem. You need to fix the powertrain problem and when the powertrain is ok, the engine code will disappear from the car engine code reader. You can easily fix the car engine with the right meaning if you have able to solve the car engine. Do not allow wrong way for solving the car engine.