i get the same cel for the o2 sensor on the passenger side right next to the trans in the totally pain in the asrsh place. ive had the shop replace it twice. but the cpu is not getting an signal from the sensor i suspect the mustve yanked on the connector too hard. if it were in a better location and the o2 sensors where cheaper i would fix it. but i drive it probably once a week so ive been lazy to fix. my mpgs havent been affect so im going to let it be for now.

i did started noticing that it would happen in the winter months. we have different blends on gas in the winter than in the summer.