So a couple weeks ago I got some codes for my van. It's a 5.8l v8, automatic. It was starting to have a studder and would die as I coasted to a stop. I didn't get the numbers but the descriptions were:

o2 sensor bank 1 sensor 1
pw sensor bank 2 sensor 2
EGR flow insufficient
DPFE monitor low voltage

So I replaced the dpfe, found out the ref line was clogged, tried to clean it out with carb cleaner but didn't work. I couldn't get the egr valve off or the pipe from the egr valve to the exhaust manifold (long story). So when I tried the 2nd time I used some seafoam in the ref line to break the carbon off. I don't know if it worked yet but it did lead me to do the seafoam clean(1/2 bottle in manifold, 1/2 in oil, and 1 bottle in fuel tank)

After driving off the seafoam for about 15 minutes (no more smoke) I drove to advance and got codes again since my van was still diying at idle(but not as often, not sure it that was seafoam still in manifold or still same problem) the codes I got where...

p0171 bank 1 running lean
p0174 bank 2 running lean

So where do I go now? Advance auto guy suggested fuel filter or spark plugs and google. I plan to do the plugs and oil change in about 50-100 miles because of the seafoam