Intermittent issue (man, they're just the greatest!) on my '97 ZJ - every once in a while the "coolant sensor failed" message will appear on the information panel in front of the shifter - I'll get an annoying "beep beep" and an orange square will appear within the outline of the hood on the display. Coolant level is fine, temperature runs at a steady 190F no matter the outside temp - think this is a "real actual" problem or just a bad connector somewhere in the wiring harness?
Cheers
Steve