Im getting an error code that says my engine is staying cold to long and its running at around 150 degrees unless i get on the highway. Could i possibly just need to change out my thermostat?

 

yes, or the temp sensor could be going bad. Is this your first winter with the truck? If you bought it used, the prior owner may have put a lower temp thermostat in the truck (to help keep it cool for towing) and you are just now seeing the effect because of the cold. Years ago, I remember removing the thermostat, and to compenstae in the winter, we would block the radiator with cardboard! I'm not suggesting you remove the thermostat, only the idea of the cardboard as a temp fix, if you don't feel like working on it now.

 

i swear the new 07's heating just sucks, it takes forever to warm up, but if you've got error codes, i would do what the others are sayin, check out the t-stat for sure

 

well i actually do have a 180* thermostat but it runs at 130 for the first 25 minutes then will come up to 150's afterwards. This is my second winter with this truck and it didnt do it before (had the thermostat then too). but im definatly thinking it has went bad or something. always damned problems

 

that sounds like something that's going on with mine, but the people at the dealership say i'm pretty much on crack, and everything's fine.

 

first thing that came to mind was a stuck open t-stat. but i would change the temp sensor also. just to be safe. the sensor and t-stat should not cost more than $20 total. also if you are out of coolant it wont read a temp. and may fool you saying the temp is low.