What gauge? The computer reads the current it draws, there should be no gauge, just a small gauge wire, such as 16 gauge.

Your 92 Buick has two?! Why does my 92 only have one?

What he means by the gauge is that it isnt throwing a SES light

Thats funny we posted at the exact time

so how do I know if it has gone bad?? just replace it and see what happens??

How much do you guys pay for an 02? Freeking autozone wants 95$ I said bullsh** and walked out... Anyways you know where to get cheaper ones? Or a part number for one maybe? :?

You got me man, someone just told me $20 buckson the boards... so I really dont know now...

But hell it would be worth it if you were losing 5mpg and got a new sensor you would get like 90 more miles per tank...I think anyway...wow never thought of it like that I needa go do that...

Thats like 3-6 dollars in savings at least

Go to ACDelco.com or our TechInfo section to get the correct AC Delco part number. Then go to ac-direct.com or gmpartsdirect.com. Both have excellent prices on O2 sensors. The ac-direct.com costs a little less to ship and they appear to get them out the door faster.

Also on my 96 I didn't have to use a special socket. I just used a 7/8" wrench. It wasn't easy, but it worked.

I have a 1993, which one of those part numbers are mine?

1993 single wire Vin # L,1
GM# 25162693 (AC Delco #AFS-20)
$26.40

1993 HTD Vin # L,1
GM# 25312185 (AC Delco #AFS-76)
$34.07

The first one if you have only a single wire coming out of it like mine. The other one if you have more than one wire. There were some odd years where different sensors were used on different engines.

I believe the supercharged engine did not have a heated sensor, while the N/A used a heated sensor in 1993. To be safe, check the wiring from your sensor.