Fixing the car engine is necessary and the engine U1222 Code helps to solve the car engine problem. It needs to know the real meaning of the engine code. The valves of apiece cylinder are kept closed using a pair of arms that replace the conventional engine’s roller-type rocker arm. The engine U1222 code is one of these arms what follows the cam profile when the 2nd arm connects to the valves. During normal engine operation the 2 arms are combined by a locking pin. However, do not follow wrong meaning of the engine code and use the real meaning of the car engine code for solving the car engine problem.