2011 aveo5 rough idle when cold

Hello, new to this forum and could use some help. I have a 2011 aveo5 lt with 120,000 miles. Recently whenever we start it first thing in morning it has been idling very rough, sometimes even stalling until it reaches operating temperature. No cel. Have cleaned throttle body, which helped run more smooth and bit more power. But still the rough idling issue. Once its warmed up, it runs perfectly fine. I'm thinking maybe temperature sensor?? Pretty sure it's not thermostat, as it does not ever overheat. Any suggestions?