Originally Posted by Richard Eldridge

The dash temp sensor is supposed to tell you how cold/hot it is outside. This is just information for you; it isn't connected to the computer or anything other than the LCD.

The sensor is under the front bumper. It's about half the diameter of a pencil with a rounded end. To make this thing work correctly, you need to replace it and that means pull out the dash instrument panel (getting to that involves a lot of work).