The engine U2002 Code is short notification of the engine problem and meaning of the engine code should be taken from the car manufacturer. The engine code has automobile meaning and meaning from different car manufacturer. The deactivation process of cylinders is accomplished by freeing a synchronizer pin that customarily interlocks the cam follower and rocker arms. The automobile engine U2001 code resolves the synchronizer pin is free using hydraulic compression which is kept by a dedicated solenoid. If you know how to fix the car engine and you have all tools for solving the car engine, you can easily solve the car engine problem.