bad o2 sensor?? but no cel
So after i install a dp and take out the cat, the o2 reading on my af gauge is ####ed. Now it only reads lean all the time. sometimes it doesn't even light up. So i did some search, and find that it might be the o2 sensor. But my check engine light never come on.
So, is it my sensor not working? or something else?
When i go to the part stores in edmonton, they all come up the same bosch sensor. The problem is the wire is way too short.
should i get one from dealer?? what can i do?
I also want to know, would a leak between the o2 hosing and the dp give me a lean reading like this??
ps: don't need to tell me how useless the af gauge is, coz i am not using it for tuning, i am not that stupid. i just have it coz there are some light, and i can know if my o2 sensor is working right or not. and i know my wiring is good, coz it worked for the pass yr.