NHTSA Complaint #11587912 — 2015 FORD F-150

Chech engine light keeps coming on. Dealer said it was an evap canister issue, I told them warning had come on prior for check fuel fill cap. (Capless). Said they needed to replace purge cylinoid. So as I'm paying $500 for the repair, I'm told this might not fix the issue. What? Started with small evap leak. And fuel door codes. That only came on at 1/4 tank used. Now it's a large leak that comes on every time I start the engine. And I got the check fuel fill door warning again. I've done every trick listed on forums to clean and lubricate the fuel fill door, it did help for a while but as stated above problem is now much worse. Dealer should know how to fix this issue once and for all. Forums note that this is a common problem with no quick solution.