Is it beneficial to replace an O2 sensor if it's not throwing a code? I recently bought an '88 Iroc and I have done a bunch of work to it. I'm giving it a complete tune-up now and I was wondering if I should replace the O2 sensor or if it's one of those "if it ain't broke don't fix it" type of things.

 

[QUOTE=Ccoe1;6457381]Is it beneficial to replace an O2 sensor if it's not throwing a code? I recently bought an '88 Iroc and I have done a bunch of work to it. I'm giving it a complete tune-up now and I was wondering if I should replace the O2 sensor or if it's one of those "if it ain't broke don't fix it" type of things.[/QUOTE

It would not hurt to replace it as inexpensive and easy to do, especially if it looks pretty old. As they age sometimes they get “lazy” and will not read as accurate I have heard on here. I changed mine out when I was going through my car as preventative maintenance. I see some recommendations to change them every 30k miles.

 

Thanks reddragon, I figured so im gonna change it out and be done with it.