Just got a used Deville has a read out for the tire pressure. Well dang thing said i had 51 PSI in the LR tire, so i let some air out, then it said I had low pressure 2 PSI under, so I put some back in and it said I had 48 PSI over. Then it said something about check tire pressure monitor?

I did check it the old fashion way and it was 31 PSI, Did I break something already on my new Caddy?

Thats all new stuff and new diagnostics. Yes, it sounds as if the wheel sensor is damaged.

This link may help with info-

http://www.motorage.com/motorage/article/articleDetail.jsp?id=76246

Logan