Fix the car engine properly and in this case, you will get help from the car engine P1271 Code what is found when the car engine is tested. If you want to fix the car engine, you can follow the procedure. Like the all car engines, this car engine process services especially established hydraulic lifters what is known as switching roller followers for the engine P1271 code intake and drain valves. The lifters can be distorted by disengaging an inner locking pin. The locking pin is disengaged by solenoids to modify oil compression fed into the lifter. A test drive is recommended wehn the car engine is ok.