P0131, PO132, P0304, PO305, PO306, P0300, P1399 are the codes i got. I don't inderstand. Spark plugs were replaced with denso, new ignition coils, 3 month old 02 sensors. Cars loses power often and sputters, was getting misfires today, CEL started blinking at stop light with some rough idle. I checked coils while running and it made no difference. I have been using shell v power 91 only. I also cleaned my egr valve. So yeah, any suggestion or help would be great. It also has 230, XXX...

 

Remove all 6 coils and inspect for any liquid in the spark plug wells, If there's any liquid in there you need to clear it out. Oil can get in there and cause issues, Also water can do the same thing.

 

I recommend NGK Iridium plugs in these engines only. I have had issues when I had Denso in one of my engines.

Also did you buy cheap coil packs? If so you need to get OEM ones. I have bought new cheap coil packs that were bad immediately after installation.