My check engine light came on today. I think the gas cap is OK. on 2004 Toyota Corolla

Could it be a partially frozen fuel line? It is very cold today, I think the high was about 20.The car heated up and ran just fine coming home. As a precaution I filled the tank and added a can of heat.

Asked by for the 2004 Toyota Corolla
have codes scanned at auto zone for free then post so we can adv
1 more answer , 1 more comment
Get the code read and post the result on here so we can assist. Parts stores usually provide this service for free. May not have anything to do with the fuel delivery.
Thank you!