2009 4.0 town and country
 

Hi, first time on here . Got some issues with my 2009 town and country.
Battery went bad. Replaced with new battery and it wouldn't run right after.
Was getting a miss fire code. ( forgot to write it down) figured with 120 on the clock I'd change the plugs. Replaced the plugs and ohm'd out the coil packs, 0.9 across all 6.
It starts and runs good for 1 min or so then starts missing and the check engine light starts blinking.
Where should I look next?
Thanks Steve

So an update, code is p0300 multiple misfires from me than one cylinder. Next ran a test from my torque pro app and came up with fail test on o2 heater monitor bank 4 sensor 4. Could this cause the above problems?

get the codes

Code was P0300