The engine fault light has been on since the classic Fu Xiao was started. Have the great gods met?

Hello, riders! When the general engine fault light is on, the main reasons are as follows: (1) oil quality problem; (2) The throttle valve is dirty; (3) A cylinder is not working normally, so it is necessary to check and replace the spark plug and cylinder pipeline; (4) Water temperature sensor failure; (5) Oxygen sensor and three-way catalytic failure; If your car doesn't shake, the idle speed is unstable, exhaust.