04 Corolla high idle speed

Hello, I'm glad to answer your question:

The new Corolla is all electronic throttle, and the normal idle speed range is between 600 and 800, which exceeds this range (high or low).

It means that your throttle is dirty and needs cleaning (it is recommended to go to a 4S shop).

The old Corolla with throttle cable can adjust the idle speed, but the idle speed range is still between 600-800, neither high nor low.

If it is high, it will consume oil; If it is low, the engine will tremble and even turn off automatically.

Thank you. I hope it can be adopted.