Yesterday evening, driving home from work (in the bitter cold... 8F) my 2010 Jag Xf Supercharged ran perfectly for about 15-20 minutes of highway driving. As I neared by home on local roads, I turned sharply into a side street and felt a vibration in the steering wheel and heard a humming sound. The vibration/humming continued for the rest of the journey. There is a background vibration linked to rpm, and it becomes much more noticable while I am turning the steering wheel (can feel it through the steering wheel and hear it clearly). I assume this is something on the power steering - any ideas?

This morning (again v cold) I started engine and it was fine (no vibration). Similarly drove to work and as I was on local roads by my office it started again on a sharp corner and continued until I arrived at my destination.

All thoughts and ideas welcome - hoping it's nothing too serious but wondering if it needs to go into dealer.
Thanks!

 

I had premature wheel bearing failure. It could be a tire issue. I'd get it checked. Steering is pretty important.

 

Seems obvious but have you checked the power steering fluid?

 

Thanks to you both - appreciate the input. Think I will take it in to get it checked.

09XFSuper - agree checking power steering fluid seems obvious - and yet I haven't done that yet... Will have a look this afternoon!

 

Good call - yes, the PS fluid level is well below the 'min' level. Taking it in on Monday as it looks like there may be a small leak on the pipe at the bottom of the reservoir. It's under warranty so hopefully they will sort it out. Thanks.

 

So - took the car to the dealer today. Apparently the power steering pump is leaking (hence the low fluid level...). Has to be replaced, so new part on order. Dealer and I both surprised that a 2-year old car with 20k miles needs a new power steering pump - but there you go...
Thanks to everyone for the help.

 

Hope they topped it off for you until your replacement pump arrives.

 

I left it with them and kept the loaner - as it could impact steering control they didn't want to take any chances...

 

Even better!!