It could be that the Power Steering belt is nearing its end of life. You may want to get it (and other belts) inspected for wear.
If you mean "what" is making noise when you turn the steering wheel? It usaually means you need power steering fluid. If you run too long without power steering fluid it will make your power steering go out. If it is making a shuttering noise when you take sharp turns. Your rear differential may need to be serviced. I would have is burnished.
Unfortunately the power steering unit is on the way out.
power steering pump noise,,,may indicate wear
if the noise is a high pitched squealing noise, the belt is slipping....if the noise is a whine or growling noise, the pump is low on fluid or the pump is bad
At the power steering reservoir.
I just got a new power steering pump and my car is making a screeching sound, even after I changed the belts. What noise does yours make
Check your power steering fluid or your fan belt could be making noise.
After bleeding the power steering the pump may make a noise because there isn't enough power steering fluid in it.
Check the fluid first
Pop the plastic covers off around the steering. you will see a contact that is making the noise, add some grease to the contact. I think it's for power to the horn.
It could be low on power steering fluid. That is a common problem. It makes a sharp whining noise when you turn the steering wheel.
Where d oyou poor the power steering fluid for 2000 acura tl