2019 Audi S4 — check-engine light turned itself off — still scan it?

Intermittent stuff lies if you only catch it once. Swap the cheap/easy piece first on the 2019 Audi S4 and see if the fault moves. You'll know quickly if you're on the wrong tree. On “check-engine light turned itself off — still,” that was the fork that mattered for me. If you share a photo of the worksheet, easier to sanity-check. Parking it somewhere I can hear it better next time.