If you play Days Gone, this guide is about a workaround for not being able to refuel, repair, sell stacked items, and buy upgrades. We hope it helps you.
How to fix the merchants and mechanics error in Days Gone
What worked for me is simple, start the game and while you're in the game or on the menu Unplug the controller and then plug it back in.
I'm not sure why, but this fixed the input that the game was not recognizing and allowed me to fully use the mechanics and merchants as seen in these images.
I hope this helps you too and it's not just a quirk.aridad which worked on my setup.