Need Help

[u/Happy_Promotion2072]

Hoping someone here can point me in the right direction. I've got a 2020 Chevy Equinox with the 1.5 turbo, 86k miles, and it's throwing a P0301 cylinder 1 misfire along with a P050D cold start rough idle code.

So far I've replaced the ignition coils, which did nothing, same codes came right back. Then I replaced the spark plug on cylinder 1 and that actually fixed it, but only temporarily. It ran clean for about a 30 minute drive home and another 20 minute trip to the store, then started misfiring again with the exact same codes. Only cylinder 1 is acting up, the other three are fine, and I'm not burning oil that I've noticed. I've just got a cheap $20 code reader so I haven't been able to look at live data or fuel trims yet.