2007 dodge charger oil light flashes on and off and engine light on

I googled the codes was just curious if there is a way to find which of these it could be

oil light flashing on/off or check engine light flashing on/off? P0301 is a misfire on cyl #1. 4 diff engines for your car? could be a plug(s) (the HEMI's have 2 plugs per cylinder),coil,injector? swap #1 coil with another coil,see if the misfire follows that #1 coil.fix the misfire first,then clear the codes,the P0430 may not return. If it does,possible cat problem? warranty is 10 years/100,000 miles on them I believe?