How often does the throttle of mazda 6 car be cleaned?

The throttle of mazda 6 cars is cleaned every 20,000 kilometers. Throttle is a controllable valve that controls air to enter the engine. After the gas enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, and the combustion will be successful. The position of the throttle valve is between the air filter of the air intake system and the engine block. Mazda 6 is a medium-sized car owned by FAW Mazda. Its length, width and height are 4670mm, 1780mm and 1435mm respectively, and its wheelbase is 2675 mm In terms of power, this car uses two engines, one is a 2.0-liter naturally aspirated engine and the other is a 2.3-liter naturally aspirated engine.