to close this thread,installed new O.E. O2 final lambda .991 at 15 co2 14.7,o2 .04,hc 52,co .30,nox 355 and at 25 co2 14.8,o2.00, hc 21, co .15, nox 103.

new o2 was needed even though there were no codes and lambda (I thought ) was pretty good. I'm done. BG Login to read more.