High idle speed, how to solve it?

First of all, the high idle speed may be a problem with the idle valve. You can try it gently.

If it has been on the high side, I suggest you go to the repair shop for inspection, which may be caused by the following reasons.

Air leakage in the intake pipe usually occurs in cars equipped with intake pressure sensors.

Secondly, the damage of the engine water temperature sensor causes the engine to enter the hot car mode.

Finally, the engine computer or idle valve is damaged, so you can try to change the idle valve first.

If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.