You do not need to change any parts or components from the car engine. No part should be replaced for solving the problem P2220 with position to only a P2220 DTC. You should consult with the vehicle service center manually and you should collect more information about the car engine problem on possible causes of the fault and obligatory testing. Solve the car engine as soon as possible by help of an automobile engineer. Otherwise, you may face verities of engine problem. Do not try to firs the car engine in wrong way and if you do not know about it, then hand over the car to an expert engineer.