Your signature says Portland, not the warmest climate, did you move? The code is related to time to temperature. If you drive off right after starting it likely won't throw a code. There is no damage done by the code occurring, it was meant to help identify a failed thermostat (stuck open).

 

I did move I will change that-I live in Palm Springs, CA now. Thank you for the info on the code, I'll keep resetting it as it comes up. Thank you!