The engine code is found in all car engines and the meaning of the engine P0778 Code is important. If the meaning of the code is found from the right source like car manufacturer, you can solve the car engine problem quickly. The problem of the car engine can be solved properly if right meaning is found. There are two main types of cylinder deactivation process used depending on the type of engine. In the collapsed state, the lifters are powerless to lift their companion pushrods design under the valve rocker arms, subsequent in valves that cannot be activated and closed.