ive got a 2003 ford f-150 sport with a 4.2L V6 and since i bought it 8 months ago i have changed the plugs, plug cables, the MAF, the air filter, the fuel filter, the coil pack, and the IMRC. I have also run fuel injector cleaner through the engine and then later sea foam through the intake. It is still sluggish when pulling off from a traffic light, stop sign etc. The only thing that it codes is an oxygen sensor. could that possibly be the problem or is there anything else i could do to fix it?

 

And the code is = ????

 

i guess everything hadnt reset yet from changing out the imrc when i coded it before. the codes are PO171, PO316, PO303, PO174. a starting point would be helpful