Emissions solenoid

I got in car one day to see the engine check light was on. Freaked out a little I must say. Then I went on Ford pass app to see that it registered on there as well. It read, problem with evaporative emissions system. After about 20 minutes of short errands, it went off, and has remained off for 1 week so far, but worried. Looking through Google it seems I may likely have issue with the purge valve? It may make sense because over the past 6 months or so my milage per km is sitting around 12.5 and should be around 8.0. So, losing milage somewhere, thought age 2018 but not sure. I did do YouTube and saw how to test this valve before totally removing it, but I can't find a diagram to show me where this thing is on my car year.
Any feedback at all would be helpful. Not at all looking to pay someone to fiddle around for $150.00 an hour. Also note, about 3 weeks ago I was rear ended and had tail gate replaced and painted not sure if this info is valid or not.