The car engine may not run properly and you need to fix it if you want to avoid any serious problem in the car engine. The engine P1434 Code is set in the car engine and you need to know the meaning of the code. The real meaning of the code lets you know about the problem of the car engine. Every car engines have this engine code but when you look for the meaning of the code, you will find it different. That is why, you should seek the meaning of the code from car manufacturer. When the car engine is ok, you need to test it by a test drive.