The engine should be fixed properly to drive the car safely and removing the car engine P0522 Code from the car engine code reader. The engine code is meaningful and problem should be fixed properly. There are now two core kinds of cylinder deactivation process used today what depend on the sort of engine. The engine P0521 code for the pushrod design which uses solenoids to modify the oil pressure carried to the lifters. In their misshapen state, the lifters are powerless to raise their companion pushrods under the valve rocker arms, resultant in valves that cannot be motivated and remain closed.