The B1657 Code meaning is not similar for all of the car. Due to the faulty engine, this code comes. However, you should read the manual of the engine. This helps you to identify the correct meaning of the code. The engineer must know the exact meaning of the code. However, if he uses the dictionary meaning, then it helps to solve the problem quickly. The valves of the individual cylinder are remained closed with a pair of arms that replace the conventional engine’s roller-type rocker arm. B1657 code one of these arms follows the cam profile while the 2nd arm joins to the valves. Through normal engine operation, the 2 arms are linked by a locking pin.