An automobile knows well how to check the car engine and fix the car engine problem. He look for the engine code to know the problem and fix the car engine properly. The car needs manual checkup also. The engine P2239 Code is found from the car engine by the machine test. If you do not use the right meaning of the code, you cannot know anything about the car engine problem. That is why, you must look for the real meaning of the code and if that is not available, then you may look for the general meaning of the car engine code.