The car engine P1211 Code is important thing and a car engineer knows well how to fix the car engine problem. You should depend on an automobile engineer to fix the car engine problem. The valves of each cylinder are kept locked using a pair of arms that substitute the conservative engine’s roller-type rocker arm. The engine P1211 code is one of these arms what follows the cam profile while the 2nd arm joins to the valves. During normal engine operation the 2 arms are combined by a locking pin. You should not try to fix the car engine problem if you are not able to solve the car engine problem.