Just started the truck this morning at got the CEL and TRAC OFF light. I have no clue why. Truck is an SR5 4WD with 15k miles. I got gas on Tuesday and I checked the gas cap, it was tight but I opened it up and closed it again just to be sure. Is this a common problem? I found a post on this from a while back but it was because something made a nest in the engine bay. Pretty sure I don't have a nest in there lol. Dealer doesn't have time for a few days so I'll scan the codes later today myself and report back.