About Peugeot 406 idle fluctuation

I took my car to the industry today for the solution of the idle fluctuation

They changed the knock sensor, the vehicle noticed both traction and excessive

The idle fluctuation is minimum a Now, I say it's reduced to a minimum.

Because the master said 406 means idle fluctuation is like an arrow

Anyone who says stop the idle at 10 is lying. He said that it wouldn't bother me. I recommend replace your knock sensor.