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o2 sensor

C3L81

Well-known member
Joined
Nov 17, 2005
Messages
173
Location
Warren Ohio
Corvette
1981 White vette 24k mi
Couldnt jump the codes to see what the check engine light was, so I decided to get a o2 sensor and see if thats it. Probably needs one anyways, so if thats not it, oh well. Hoping to fix it before I have to take it to a dealer and get screwed. So anyways there is lots of O2 sensors out there, and lots of part numbers. Can anyone give a reccomendation? Bosch seems to have the most available, but I dont know what part number I should get. I did see a AC delco as well, should I grab that? Thanks!
 
auto zone has them, part # 12028, for $21 . By the way, if you jump accross the wrong two terminals on the ALDL connector, it will cause the check engine light to stay on when the the key is turned on. Mine was opposite to what the pic in the service manual showed. Look for the one that has a divot cut into it. go to that one, and the one next to it. turn key to on, and it should cycle light to read codes.....remember, the first code: flash, pause, flash, flash is code 12. it will do this 3 times, then go into any stored codes 3 times each. then, it will go back to code 12.
 
Mine was opposite to what the pic in the service manual showed. Look for the one that has a divot cut into it. go to that one, and the one next to it.
Think I had the right ones, but Ill check it out. Thanks!
 
The AC/DELCO part # is AFS-20
The GM part # is 25162693

And this is the right one. The others have the wrong connectors.
http://cgi.ebay.com/ebaymotors/ws/e...d=1,1&item=8029811799&sspagename=STRK:MEWA:IT

You should try to bug the ALDL to read the code.
You can get a code reader from Sears for about $30.00 All it does is short the connector, but it shorts the right 2 wires.
No sense throwing parts at it if you don't have to. But typically the O2 sensor or the EGR valve are the 2 most common sources of check engine lights coming on.
 
The AC/DELCO part # is AFS-20
The GM part # is 25162693

You should try to bug the ALDL to read the code.
You can get a code reader from Sears for about $30.00 All it does is short the connector, but it shorts the right 2 wires.
No sense throwing parts at it if you don't have to. But typically the O2 sensor or the EGR valve are the 2 most common sources of check engine lights coming on.

Great advice. Thanks. Love the name, you wouldnt happen to be a Floyd fan would you? If so you just ran into one of the biggest in the world. Ill hold back until You say yes.

Gilmour in April 15th row!
 
Are you srure that the sears code reader is for cars before 1996. All the ones I have seen are for 1996 and up, and are the 16 prong.
 
Actually yes, I saw my first tour in Cleveland on the Animals tour and their last Division Bell in Toronto.
But, that's not where my screen name came from.

I was on a bowling league. www.spacebowl.com
and our 3 man team was 2 other guys and myself.
Our high bowler wasn't able to make the first 10 weeks off bowling because of his son's football league. His last name is Yu,(the only guy on the league to bowl 2 300 games) and every week we kept saying we wish Yu were here. So when I started my AOL account I tried about 25 user names with "Vette" in them and they were all taken, so as a last resort I used Wishuwerehere and it was taken too, so I added 82 for my '82 Vette on the end and it finally took.
Our team won the championship that year going from last place to first place in 28 weeks, and I kept the name to remember "from frustration comes rewards".

Anyway, I have 2 of those O2 sensors on the wall in the garage if you want one. They're used, but they work. Yours probably does too. I was throwing parts at my Vette too at one time.

Oh, and the code reader at Sears is an actron CP9001 for older GM cars.
 
The 9001 Says its for 1982+

GM Code Scanner
ACT-CP9001

E-mail this product to a friend


Plugs into the on-board computer
Trouble codes flash on dashboard "Check Engine" light
Compatible with 1982 - 1993 GM vehicles
1994 and 1995 vehicles may require a Scantool in order to access the engine computer
All 1996 and newer GM vehicles are OBD II-equipped. Check out the CP9135 OBD II AutoScanner.
 
http://www.corvettedoctor.com/1981_DTC_Codes.html

23 Mixture control solonoid circuit

44 Oxygen sensor lean

55 Faulty Oxygen sensor or ECM

It's a cause and effect problem but it's hard to know which is which.
Try replacing the O2 sensor then scan it again, it could be from the mixture control solonoid circuit which controls the lean/rich mixture, and the ECM is detecting that it has a problem. Maybe a loose wire or connector, or a burned out solonoid. But it could be that the O2 sensor is not providing the proper feedback to the ECM controls.
 
According to the knowledge base, the correct O2 sensor is an AFS5P. It may have a different copnnector than the one I told you earlier. If in doubt, remove it and take it with you to the parts store.
 

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