Answer by Trev for Sputtering while driving & idling

Since this was a 2 part fix, I'll add it as the accepted answer, though Bob Cross got half of it correct. I never checked the EGR as DeviateDefiant suggested as it was fixed before getting to it.

The fix:

1. The O2 sensor was replaced.
2. The MAF sensor was corroded, so it was cleaned.

I can't help but wonder if we fixed the MAF sensor first if the O2 sensor would've needed replacing. The codes were pointing to the O2 sensor though.... I guess we'll never know. :o)