: Engine thinks its hot when its freezing out!!??

12-22-12, 04:01 PM
So last night it was -21 Celsius so I plugged my 07 ext in. The next day I drove to the store. Everything seemed fine. When I got back from shopping I started the truck and got this warning

" engine hot turn AC off". I turned truck off to see if it would return and when I tried starting the 2nd time. It took a while to start.( even sputtering once started)
I drove home and fans were on. And engine temp didn't heat up at all. It's -17 outside Why does the truck thinks its hot? Thermostat?
Anyhelp would be appretiated

12-22-12, 07:15 PM
definately thermostat

12-23-12, 09:35 AM
More like a coolant temp sensor. Check the connector going to it for corrosion or spread terminals. It's on the driver's side head.

Cadillac Cust Svc
12-24-12, 01:12 PM

I am sorry to hear about your concern. Are you planning to visit your local dealer. Keep us posted and feel free to reach out if you need anything. Thank you.

Tricia, Cadillac Customer Service (Assisting Katie).