Issue resolved. New EGR valve installed. Hate to have paid a shop for this but they fixed all issues I had noted in this thread. Markup on this part was absolutely incredibly effing high FYI. Then there's diagnostics/labor on a $87 part and you can pretty much deduce the dollar amount of rape I subjected myself to by letting a shop do this. Recent promotion at work prevented me from doing this myself because sadly I've been too busy to even look at a wrench lately. All OBDII codes clear now. 02 sensor code was for heater circuit only. Try as I might to understand why the 02 sensor heater code was set I just haven't had time to worry about it again until it returns.
*EDIT*
I could really use a code-scanner for situations like this one. I just need something basic. Any suggestions? Thanks.
