The B1457 Code is not really unique and this code is available in different engines of cars what is correlated with the model and manufacturer. For this reason, you need to know the model and manufacture of the car to understand well for solving the problem. You must defuse of cylinders is achieved by discharging a synchronizer pin that usually interlocks the cam supporter and rocker arms. B1457 code resolves the synchronizer pin is free using hydraulic pressure which is maintained by a dedicated solenoid. The problem of the code appears for the body of engine and so, you do not need to change anything from the engine.