You should be careful if you detect any problem in the car engine and test the car engine by the car engine code reader. The engine P0997 Code is found on the engine code reader by the test of the car engine. The engine code has various meanings and you need to know the right meaning. Find the real meaning of the code by the name of the car and car manufacturer. In the car engine manual, you will get the real meaning of the code and the problem of the car engine is fixed easily. You must allow automobile engineer to fix the car engine.