The car engine P2171 Code is vital thing and this code is meaningful for solving the car engine. The problem of the car engine can be fixed easily. The problem of the car engine is found like small but critical, a spark plug types the car move. Its role is to kindle the beaten fuel in the engine. A damaged spark plug will reason a frail spark. It may even stop eruption completely, or reason eruption at the incorrect time. A backfire will affect engine power and fuel economy and reason enormous amounts of possible damage. It is important thing for solving the car engine by an automobile engineer.