I have a JDM b16a that runs well in my 88 civic hatch and I keep on throwing o2 codes. I replace the 2 o2 sensors 4 months ago so i dont know what the deal is. I was wondering why they are burning out every 6000 miles. I am running Bosh o2's through sheilded wiring so and my wiring is correct. So any help will be most excellent.

 

azre you using 2 o2's or 1? if your using a pr3 ECU you need 2 o2's.

 

Im using 2 o2s and they are both throwing codes randomly when i am on the freeway

 

Thats odd, and its only on the freeway? does it happen in a specific gear and speed or jsut whenever you are on the highway? does it happen right away after to get to the speed/gear?

 

where in the exhaust stream are they mounted?

 

The o2s are mounted on the header like normal. They only through codes when on the free way randomly. I still get 34 mpg so im not shure if my o2s a really bad.

 

It usally happens after I am at freeway speed for a while.

 

perhapse its leaning out too much?

 

I might be but i run on the slightly rich side when i floor it. I checked with a crappy af meter. If i am running leand how can i fix that because i am running stock engine management.