The B2145 Code is important to know to solve the problem of the car engine. The valves of every cylinder are remained closed by a pair of arms that extra the conservative engine’s roller-type rocker arm. The B2145 code is one of these arms follows the cam profile though the 2nd arm joins to the valves. During the normal engine process, the 2 arms are linked by a locking pin. The real meaning of the code is possible to know if manufacturer name and model number of the car are known. The code meaning is linked with the manufacture and model of the car.