For a variety of reasons, on these cars you usually need to replace both when one of them goes out. That was my experience a while back as well.

And definitely use OEM sensors! These cars don't seem to tolerate aftermarket O2 sensors.

 

TacklaNHL, how can you say that you couldn't find that info anywhere on the net but used my photo to show as an example?
My photo: http://atthetipwebs.com/technologyin...o/PICT0218.JPG

My write-up: http://atthetipwebs.com/technologyin..._O2_sensor.htm

Glad you got your O2 sensors replaced.

 

Yea, I found the photo after I was all finished up... and then edited into there... so that guys knew what I was talking about.

 

But I found the photo on a google photo search... didn't pull up the tutorial... just the photo alone on my browser.

Didn't know whose it was. Sorry about that.

 

No problem man. I posted the link to try to help people get those things replaced. I also put a link in a thread in this forum somewhere. It was done in November. I stuck it in someone elses thread so I wouldn't start a new thread about the sensor replacement. When you do a search so much comes up it's easy to get lost.

Maybe the thread I posted it in was one with the error code, P0137.

Here is the other thread: https://volvoforums.com/forum/showth...ght=code+p0137