Oxygen sensor 3 wire instead of 1??? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 04-20-2005, 06:29 PM   #1
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Default Oxygen sensor 3 wire instead of 1???

I ordered an O2 sensor from GMPartsDirect.com. Before I did I have done some research and learned that the older models have single wire, and while browsing that site it took me to the single wire. I also looked in the engine compartment and saw what I thought looked like a single wire connection coming from the firewall to the middle of the engine. So I bought it, it arrived today, popped the hood, and I looked for where I thought I saw a single wire O2 sensor sticking out. But upon closer look and following Chilton'*, my car has 3 wire! Its where its just below the spark plug on the right side, correct? Well from the exhaust manifold protrudes 3 wires, purple, red, and black. So now im pissed off because my car is some kind of hybrid that has a heated sensor. Or am I an idiot and is it something else?

On that note, can I get the part number for the heated sensor so I get the correct one? Oh, and if anyone needs one you can now buy the single wire from me now. That is unless I made a mistake. DOH!
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Old 04-20-2005, 06:31 PM   #2
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That sounds like it. But I thought 93'* had one wire O2s like 92.
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Old 04-20-2005, 06:46 PM   #3
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Look at your emissions label under the hood. You'll see either "O2S" or "HO2S". The H stands for heated.


Heated 93 SSE owned by Jseabert



My non-heated SSEi.
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Old 04-20-2005, 07:17 PM   #4
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Well there it is, it IS heated.

Do you have the part number for the heated O2 sensor?
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Old 04-20-2005, 07:56 PM   #5
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Quote:
Originally Posted by Boreas
Well there it is, it IS heated.

Do you have the part number for the heated O2 sensor?
******EDIT***** Wrong info removed.

Good luck.
BTW, I am definitely willing to buy that AFS-20 from you. Can you hold it until Friday? I can make the payment then via Paypal. PM me about this.
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Old 04-20-2005, 08:11 PM   #6
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1993 was an odd year... Both sensors were in use... I think most of the 3800 Vin L NA'd applications had the Heated O2(3 wire) where most of the SC'd applications used the single wire O2...(Unheated)

In 1994 I think all of the 3800 Models went to the 4 wire O2 sensor(Heated)

For anyone that has a 1993 model GM car or minivan with a 3800, look at the emissions label just as Bill Posted... It will tell you which sensor you have...

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Old 04-20-2005, 08:20 PM   #7
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OOPS!!! I made a mistake up there in case you didn't catch it.
Here'* a 'Copy & Paste' from techinfo.

1993 HTD Vin # L,1
GM# 25312185 (AC Delco #AFS-76)
$34.07
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Old 04-21-2005, 12:28 PM   #8
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Thank you!

Sure ill hold on that sensor for you. I made a thread in the for sale section so just PM me when you are ready. I dont have paypal so you can send me a check if thats ok with you.
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