This automobile engine P2221 Code is really helpful and you will find the code from the car engine by the test. Meaning of the code explains about the car engine problem and helps to solve the car engine problem. Every part of the car engine code lets you give some information what you should know. You can know the meaning of the code from different sources but all sources do not provide correct meaning. You must allow meaning of the code from only automobile manufacturer of your car what is fully correct. When the car engine is ok, take it for a test drive.