Check Fuel Cap Warning After Fuel Tank Swap

Did the 38 gallon tank swap last week everything went smooth truck runs normal, but the blasted check fuel cap warning comes on and stays on every time I crank the truck except when I start the truck after its warmed up. I went back through the system everything is secured correctly I'm confused. Help!

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Checked for codes in the ECU?

Wonder if you have a EVAP leak detected or not.

Could occur cold vs hot engine due to the self test parameters. Leak could be detected during the self test chiming a warning upon next restart. Self tests are run engine off.

 

Typical Toyota it self healed, haven't seen the error message in over 400 miles. (knock on wood) I did check for codes but nothing was showing.