You need to get the meaning of engine P0543 Code from the car manufacturer. The code has right and wrong meaning. If you find the right meaning of the code what is set by your car manufacturer and wrong meanings of the code are not related with your car. So, when you look for the meaning of the code, you must seek the right meaning. You need to find the real cause of the car engine problem. If you know the process of solving the car engine and you have all tools for solving the car engine, you can try to solve the car engine. When the car engine is ok, take it after a test drive.