You need to know the real meaning of the code and the car engine P2190 Code is also meaningful. The engine lest you know the problem of the car engine problem. An automobile engineer can solve the car engine easily and fast than you. The valves of each cylinder are remained closed by using a pair of arms that replace the conventional engine’s roller-type rocker arm. The engine P2190 code is one of these arms what follows the cam profile while the 2nd arm attaches to the valves. During normal engine operation the 2 arms are joined by a locking pin.