Car idle speed is high! Throttle! The idle motor has been cleaned, and it is still high! What's going on here?

Check whether the vacuum tube of the engine leaks, and replace the vacuum tube if it is determined to leak; Check whether the engine fault light on the instrument panel flashes. If engine failure is found, go to the 4S shop for computer testing immediately to see which parts have problems that lead to unstable idle speed, including sensor failure, engine combustion failure, valve position sensor failure and so on. Third, check whether the throttle valve is dirty, because dirty throttle valve will cause the throttle valve to close loosely or the idle speed is unstable, which will lead to the high idle speed of the engine.