Search the forums here for "RDS" or "Radio Data Service". This has been discussed a lot. I haven't seen any explination for the cause, but an easy fix has been discovered.
In the passenger side fuse box, pull fuse # 11 (with the key off). Re-insert the fuse after a couple of seconds or more. Your RDS info will probably reappear.
I discovered this in December, and my RDS info has remained since then. Others have tried this, and it sticks for a while, but sometimes disappears again after some combination of selecting preset stations. No one has nailed down a conclusive pattern yet, but the fuse #11 fix seems to always bring it back.
In the passenger side fuse box, pull fuse # 11 (with the key off). Re-insert the fuse after a couple of seconds or more. Your RDS info will probably reappear.
I discovered this in December, and my RDS info has remained since then. Others have tried this, and it sticks for a while, but sometimes disappears again after some combination of selecting preset stations. No one has nailed down a conclusive pattern yet, but the fuse #11 fix seems to always bring it back.