Buick's idle speed in the new century is as high as 3000 rpm. How to fix it?

Buick's idle speed in the new century is as high as 3000 rpm. If it is a new car, the high speed of the hot car will disappear automatically in about 3 minutes.

If the idle speed is still unstable after hot start, you can check and confirm it from the following aspects:

The first is the throttle, which is a big reason. It is necessary to readjust or clean the throttle valve and replace it with a new throttle valve assembly if necessary.

The second is the driving computer. The error code of the driving computer will also lead to unstable idle speed, so go to 4S to upgrade the computer or refresh the computer.

The third is the sensor, which is relatively simple. Unplug the sensor, plug it in again, and see what happens.

Generally speaking, the probability of sensor failure is very low. When symptoms appear, go to the repair shop quickly, so that workers can easily find the problem and the reason.