The B1889 Code has various meaning and meanings of the code set by the manufacturer of the car. If you want to know the exact meaning of the code, you need to know the manufacturer and model number of the car. You can get all this information form the car manual. Some automobile engineer prefers to use dictionary meaning of the code for getting basic meaning of the code for solving the problem. The valves of individually cylinder are closed via a pair of arms that change the conventional engine’s roller-type rocker arm. The engine B1889 code is one of these arms what follows the cam profile while the next arm joins to the valves. During normal engine operation, the 2 arms are combined by a locking pin.