Meaning of the engine U1308 Code is necessary for solving the car engine problem. If the right meaning of the code is found, do not follow any meaning of the code. The valves of single cylinder are remained closed by a pair of arms that change the conservative engine’s roller-type rocker arm. The engine U1308 code is one of these arms what follows the cam profile while the 2nd arm joins to the valves. During the normal engine action the 2 arms are linked by a locking pin. Do not drive the car with any type of engine problem and test drive is necessary after fixing the car engine.