If you do not know about the car engine code and how to use it, you can use google tool for learning about this issue. The car engine P2043 Code is found after the test of the car engine. The engine problem is small problem but it can be critical what a spark plug types the car move. Its purpose is to ignite the beaten fuel in the engine. A worn spark plug will purpose a weak spark. It may even stop ignition totally, or cause detonation at the wrong time. A misfire will move engine power and the fuel cheap and reason massive amounts of possible harm.