Code came up that engine is running too cool?

Hello,

Anytime the engine run cooler than it should, the first item needs to be checked is the thermostat.
If you have a stuck open thermostat it will not allow the engine to reach the operating temperature and the engine will run cooler.

https://www.2carpros.com/articles/how-an-engine-thermostat-works
https://www.2carpros.com/articles/replace-thermostat

Remember to only work the cooling system of the vehicle when the engine is cold.

I have attached the thermostat replacement diagrams.

Please let me know of any questions.
Thank you.