Axel- As you already know the b1-2 o2 (2096) is running lean and PCM is trying to fatten it up.

The b2-2 o2 (2099) is running rich and PCM is attempting to bring its volt. down.

The 2096 will set if PCM drives it rich >2.93% for 24 out of 25 monitored secs... Login to read more.