When my car is cold I get 2 loud beeps upon starting up the car.Runs great tho

This is indeed a low coolant warning. If you look on the dash, you should see a low coolant icon flashing as the vehicle beeps. It doesn't do it when the car is warmed up because the coolant system has expanded/thermostat has opened, possibly filling the reservoir enough to prevent the warning from triggering. With all that being said, the car could be full of coolant and just have a faulty level sensor. Hope this helps!