The engine U1252 Code has various meanings and collecting the right meaning of the code is important thing for solving the car engine problem. Do not drive the car with any minor or major problem of the car engine. You can easily know the right meaning of the engine code from the car manufacturer. Do not follow automobile dictionary meaning of the code while you have right meaning of the engine code. It is easy to know the automobile meaning of the engine code from online but do not allow that meaning for the car engine. This may make new problem in the car engine.