why did bumping a tree with passenger mirror cause power steering loss?

What is your question?

I backed into a tree and hit it only with passenger side mirror. Wasn't going fast as driveway was iced up. I had power steering before bumping the tree but lost it immediately after. Lexus dealer found codes C1532 & C1568. C1568 reset but C1532 came back in and won't reset. Also have the red "P/S Fail" light on dash. dealer says all connections and wires checked good.