The engine P0238 Code comes for the car engine problem and it is easy to solve the car engine as soon as possible. Like the all car engines, this car engine system services especially advanced hydraulic lifters which is known as switching roller followers for the engine P0238 code intake and use valves. The lifters can be collapsed by undoing an internal locking pin. The locking pin is detached using solenoids to change oil compression fed into the lifter. You must not use wrong meaning of the code for solving the car engine. The wrong meaning of the car engine code may make trouble in the car engine.