I checked all the connections in that area and everything was good. And the gauge still isnt working.
After looking around and talking to some people, I am thinking it may be the coolant sensor, which is a cheap fix, just looks like coolant will get everywhere.
Have the new part right there, ready to go. Keep your pressure cap on, keep the cooling system sealed. When you pull the old sensor out, thread the new one in quick. You might be surprised on how little coolant comes