This engine P2818 Code is a necessary thing and contains information of the car engine problem details. You can know more things about the car engine’s problem if you study about the meaning but the right meaning of the code should be used for solving the car engine problem issue. The valves of each cylinder are kept locked by using a pair of arms that replace the conventional engine’s roller-type rocker arm. The engine P2818 code is one of these arms that follows the cam profile while the 2nd arm connects to the valves. During normal engine process the 2 arms are linked by a locking pin.