Solving the car engine is necessary thing and fixing the car engine of your car is necessary if you know the meaning of the engine P0071 Code. If the right meaning of the code is not found, it is not possible to solve the engine problem. There are now 2 types of cylinder diffusion ways used today, dependent on the sort of engine. The engine P0071 code for the pushrod design which customs solenoids to change the oil compression delivered to the lifters. In their distorted state, the lifters are impotent to elevate their companion pushrods under the valve rocker arms, ensuing in valves that cannot be motivated and is closed.