The engine P2027 code seems a kind of powertrain problem and the problem may start different causes. If the car engine is checked manually, it is easily find the real meaning of the code for solving the car engine. Like all the car engines, this car engine method employs what particularly improved hydraulic lifters which is recognized as switching roller followers for the engine P2027 code exhaust and intake valves. The lifters can be distorted by disengaging an inner locking pin. The locking pin is disconnected using solenoids to modify oil heaviness fed into the lifter. Do use wrong method for solving the car engine.