The engine C1818 Code has come for the screen of the car engine and this code is a kind of chassis problem what can be solved at cheap rate. Like the all the car engines, your car engine method works particularly advanced hydraulic lifters which is known as switching roller followers for the engine C1818 code intake and finish valves. The lifters can be misshapen by undoing an internal locking pin. The locking pin is disconnected using solenoids to modify oil compression fed into the lifter. Do not drive the car with any engine problem. You can try to fix the car engine if you know how to fix it.