My temp Guage is stuck on the cold all the time it use to go from normal to cold now it stays on cold

This can be a thermostat that is stuck open, a bad coolant temperature sensor, or a bad connection at the coolant temperature sensor. Is the check engine light or service engine soon light on? If so, the problem is most likely a stuck open thermostat. Hope that helps! Jim

Hook up a scanner and see what the real temperature is. If temp is within range, around 195, it will be your temp sensor. 02-05 on the I6 engine, temp sensor is right above thermostat, might as well replace both since you're there. 06-09, it moved locations to passensger side way in the back on the block.