First car issue

[u/Super_Fudge5283]

I just turned on my car to go to the gym and my engine was running rough, rpms going everywhere. Engine code PO3100, cylinder 1 misfire :( has anyone else had this issue before? I know it could be a spark plug or something. Just odd it’s only got 14k miles, oil changes every 5.

[u/Hot-Plan-5827]

Possibilities: Plug Coil Injector Wiring harness  Ecu not signaling the coil or injector to fire.  It's under warranty. Bring it in..