Check engine light went on...took it in to independent Volvo dealer. He wouldn't give me the printout for the codes, but said it was an oxygen sensor. I asked which one and he said he has to inspect all four of them to figure out which one. Doesn't the code tell you exactly which one is bad? I think he's kinda shady, not wanting to give me the printout of the codes.

So, what should I do? I WILL do this repair myself. Where's the cheapest place to get sensors? I was told $250 each sensor at Volvo. Was also told there's 4 sensors total. Just looking to replace faulty sensor for now and don't want to go hunting. If someone could give me some details as to where each one is located would be awesome and save me hours looking for them! Thanks

 

I hear ebay sells the sensor for cheap

 

Go to aamco.com and check out their locations. According what I heard on the radio and their website, you can get a free external diagnostic test with an initial computer scan (especially with engine light on). You can always call the nearest location to check it out before you go.