The diagnosis B1407 Code has several meanings and it is not easy to understand the meaning of the code until you read the manual and know about manufacturer and model of the engine. The valves of for each cylinder are closed or shut off for using a pair of arms that substitute the conservative engine’s roller-type rocker arm. The B1407 code one of these arms tails the cam profile while the 2nd arm attaches to the valves. For the normal engine operation, the 2 arms are combined by a locking pin. You should take the car for test drive to understand the problem is solved or not.