I have a 2000 GTP My exterior temperatre reading has been at 72 degrees for the past two days. I'm in St. Louis it's 91 today. What's wrong and how do I fix it? I have read numerous post on here and clubgp but none of them were explanatory in solving this problem. Any help would be greatly appreciated. Do you think it would help to pull the fuse relay I located that but I don't think it's the problem because the interior works fine. But I will try this later on tonight.

I have the same problem. There is an earlier post about this. It's your outside air temp sensor. I believe it's a $10.00 part. It's located in front of the radiator, buy the hood latch. Check for an earlier post "Outside Air Temp Sensor" to read a little more about it.