Rely of the right meaning of the engine C1902 Code. You may find several meanings of the same engine code but do not use that meaning. The automobile meaning of the code is available online. Do not use wrong meaning or automobile meaning for fixing the car engine problem. The valves of individual cylinder are reserved closed using a pair of arms that change the conservative engine’s roller-type rocker arm. The engine C1902 code is one of these arms what follows the cam profile while the 2nd arm joins to the valves. During normal engine operation the 2 arms are linked by a locking pin.