I took my car to get my state inspection and they told me that my o2 sensor is at fault(PO135) so he told me he could reset it and that I would have to drive 20 miles to correct it, my question is would resetting fix it or would I have to fork out the 100 bucks for a new sensor?

Someone else told me that changing the oil would help me pass but I changed it only 2000 miles ago.


Sorry if there is a thread already like this but thanks for any help.

 

what year and model and engine?

 

If your CEL is staying lit while you drive and that's the only code you have, it's going to need a new sensor. You can try resetting but the light is probably going to come back on after a drive. Your car will not pass if the CEL is on for any reason. Also you can't reset and go right back for a test before the light comes back on, because a code will be set indicating it has been recently reset, so it won't pass because of that.

 

its only 60$ at advance auto parts ive just bought one, and yes it will have to be changed if the cel is on for it.

 

It's a 97 Civic Ex.


Well I replace the sensor before the cat converter took it back to get re-tested and it failed with the same codes...Po135 and P1509 which is the o2 sensor bank 1 sensor 1 and my IAC valve...sooo I can't buy a new sensor and a new IAC valve my question is can I clean the IACV to make it work and what can I do about the o2 sensor even after I put a new one in?

MY CEL light doesn't work either.

Oh is the d16y8 a "vtec"?

 

yes clean the iacv, here is a link on the how to.
http://www.team-integra.net/sections...ArticleID=1174
and for the o2 put the one you took out back in and put the new one in the other o2 spot.

 

Ok I'll clean it.


Why is there a downstream and upstream o2 sensor? wha'ts the difference