The engine should not be unfixed. You need to know about the engine P0743 Code if you want to fix the car engine. The engine code is descriptive and by the real meaning of the code, you may learn more information about the car engine problem. However, test the car engine to know the cause of the car engine problem. You need to study about the engine code if you want to solve the problem from the car engine properly. Do not use false meaning of the code what does not give you correct information about the car engine problem and let it fix the problem properly.