u/Pimpkingaviator

(2020 TI sport) I’ve been plagued by a persistent cold start misfire, it began after an oil change and new spark plugs. The car will misfire for about a minute before running and idling normally, and will occasionally set off the “auto start/stop unavailable” warning light with no CEL. It has had two pending codes for P0301 and P0302 but not at the same time. I changed the oil again, verified correct viscosity, serpentine belt is not worn and is within the wear indicator, spark plugs were set to correct gap (swapped with NGK). The battery was replaced in February but has a voltage of 12.4 after sitting overnight.