The engine P258A Code is found in the car engines only and the meaning of the code tells about the car engine problem and the location of the car engine. If you want to fix the car engine, you need to know the location of the car engine problem fist and the code helps about that first. Once you know the place, you should take steps to solve the car engine issues. If you have no experience and no tool, you must not try to solve the car engine problem. If you wrong meaning of the code, you may add more problems in the car engine.