Power steering issue

[Imran]

Hi All.

Some advice, about a 3 weeks ago my steering starting to make a whirring noise, but only on full lock or close to full lock. Doesn't make any noise when stationary and putting full lock on. When you get to 90% full lock or full lock you can hear a whirring noise, like a motor somewhere. Does it on reverse, and doesn't matter if its full lock left or right. Steering weight hasn't changed, no wobble in the steering wheel, no vibrations

All suspension has been checked, tyres checked for rubbing or any noticeable signs of rubbing, nothing. CV boots are fine.

It did it for a week and then stopped, but today it starting doing it again, noticeable when crawling or driving very slowly.

Is there any way of checking the power steering, as its electronic, using vcds? Any ideas what it could be. Cars a 58plate with 150k miles. 2.0 tdi.

Thanks