Can you get disqualified? How?

One race I accidentally ran only mediums, then with 10 or so laps to go I got warning dialogue from a race engineer that we need to go to another tire type or we'll be DSQ, so I immediately switched to softs. Had I not done so, would I have been DSQ? What would that have looked like? And are there any other ways that can occur? (Since you can't get bopped for plank wear or a marshal push start lmao)