Hard Steering at Low Speed

When attempting to make a turn (either direction) at low speed it feels like the power steering has gone out. The problem is getting worse. Steering works fine about 25 MPH. I have heard that it might be a Wheel Speed Sensor from reading this forum but don't know what to look for or where it is located?

I had the same problem and I was ready to change my pump.

I was due for new tires and put on a new set and the problem went away completely!

That set is close to needing replacement and I have noticed that the steering is slowly getting harder as the tread wears down.

FYI