The diagnosis B1310 Code is set for the engine and if you want to solve the problem of the engine, you need to know the meaning of the code. The engineer gets the definition of the code when he gets the model and manufacturer of the car. The valves of individual cylinder are closed using a couple of arms that substitute the conservative engine’s roller-type rocker arm. The B1310 code one of these arms follows the cam profile while the second arm connects to the valves. Thru standard engine process the two arms are linked by a locking pin. The catalytic converter has an oxygen sensor what is in front and behind it.