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big red
Dodge Dakota
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11/10/2002
19:23:08
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 Subject: O2 sensor
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Does anyone know of somewhere to get a cheap O2 sensor? I checked autozone and they wanted like 65 bucks. Also, I was wondering if the Pre-cat sensor and post-cat sensor were interchangeable.
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Jon
Dodge Dakota
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11/10/2002
19:49:35
|  RE: O2 sensor
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$65 bucks is a good price. You would pay $200 at a dealer, and close to $100 for most aftermarket sensors. If you have a new vehicle with the fancy A/F sensors they run close to $400! And they don't last any longer.
-Jon
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big red
Dodge Dakota
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11/11/2002
11:20:48
| RE: O2 sensor
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I guess I will get them from Autozone then. My other question was are the one in the front and the rear interchangeable? Does anyone know....?
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jbiagasjr
Dodge Dakota
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11/11/2002
17:43:53
| RE: O2 sensor
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I just recently changed my O2 sensor (about two weeks ago). I too went to autozone and they had two different kinds of O2 sensors for the truck. One was an OEM part for $45 and the other was a universal sensor for $65(they may also try to get you to "rent" a socket tool that allows you to take off the sensor for $15, but you get your money back when you bring the tools back.) Not sure what year model your Dak is but mine was a '94 with 160K miles. If your truck is anywhere near as old as mine, it will take a little longer than 5 min to change and it may be a good idea to get some WD40.
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big red
Dodge Dakota
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11/12/2002
00:16:05
| RE: O2 sensor
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Thanks for the advise. My truck is a 99 with about half as many miles as yours, but I am sure it will be no easy task to get that sensor out.
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Turtle
Dodge Dakota
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11/18/2002
17:20:51
|  RE: O2 sensor
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Try Carquest. I cant remember but I think I paid about 65 for mine. 91 Dakota 4x4 3.9L v-6
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Hauler
Dodge Dakota
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11/20/2002
00:00:27
| RE: O2 sensor
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Just a thought. When I replaced mine, only one part number (per Manufacturer) was specified. Does this mean only one O2 sensor is available and is can be applied to either the intake and the exhaust?
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MoparDude340
Dodge Dakota
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11/20/2002
15:59:16
|  RE: O2 sensor
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They're both the same. When you look at a schematic for them, they are even linked in parralel to each other. The one that is before the cat is the one that is important. If it goes bad, your truck will start to go loopy. The one after the cat is just there to verify the other and tell one wheather or not your cat is outta gas yet. If that one goes bad it won't effect how your motor runs, but you will get a code for it. I just changed my pre-cat one or "down stream" one the other day and payed 61 bucks for it, so the price is right. If you find one cheaper, your lucky, unless you wind up getting what you payed for and it kicks the bucket in a month or two. Anyways, hope that helps.
Later
'98 3.9 RC... A few mods... ;-)
'88 340 RC... I'll never tell... Okay, I might... ;-)
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Black Dog
Dodge Dakota
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11/20/2002
17:06:49
| RE: O2 sensor
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Mopar Dude,
Would you agree that the Intake sensor gets fouled less and prob'ly needs almost never to be replaced? Manufacturer spec's that you should replace the exhaust O2 sensor about 50 to 60k. So maybe after about 100k miles you need to look at the intake manifold's sensr?
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MoparDude340
Dodge Dakota
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11/22/2002
16:09:00
| RE: O2 sensor
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Black Dog,
I'm guessing you are asking about the IAT sensor. All it is, is basically an electronic theremometer. It tells the computer how hot or cold the air is coming into the intake, telling it how much fuel, air, spark it needs to run the best. That's why everybody on here is so crazy to take it off the intake and move it somewhere colder. By doing that, the computer thinks it's colder causing the computer to put a more aggressive fuel, spark curve on the motor, creating more power. Although this is a "thermometer," it still wears out over time and needs to be changed now and then. I usually change all of my sensors every 50,000 miles or so. It's kinda pricy, but if you are only doing it every 50,000 it isn't that much money if you put it into that prospective. Hope that answers your question.
Later,
'98 3.9 RC... A few mods... ;-)
'88 340 RC... I'll never tell... Okay, I might... ;-)
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DakotaJeff
Dodge Dakota
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11/22/2002
16:56:08
|  RE: O2 sensor
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99Kota c.c..just turned 49,000mi and had the truck in the dealership cause the cat. had gone bad(rattles)..frrebie...but they told me they couldnt get the O2 sensor out..so i had to buy a new one..116 plus tax
i do have a question though..ive relocated the iat into the intake, and since then..noticed soot on the tailpipes...could this have caused the cat. to go bad??
Jeff
http://dangerousobsession.tripod.com/jeff.htm
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MoparDude340
Dodge Dakota
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11/22/2002
18:45:13
| RE: O2 sensor
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Jeff,
Relocating your sensor to a colder place will make your truck run richer. Over time this will shorten the life of your cat. Under 50k does seem a little soon for it to go out on you though. Maybe it was just a flook. I wouldn't sweat it unless this turns out to be a repeat problem. Hope that helps.
Later,
'98 3.9 RC... A few mods... ;-)
'88 340 RC... I'll never tell... Okay, I might... ;-)
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Machine
Dodge Dakota
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1/07/2004
18:35:15
| RE: O2 sensor
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Message:
Jeff,
Relocating your sensor to a colder place will make your truck run richer. Over time this will shorten the life of your cat. Under 50k does seem a little soon for it to go out on you though. Maybe it was just a flook. I wouldn't sweat it unless this turns out to be a repeat problem. Hope that helps.
Later,
'98 3.9 RC... A few mods... ;-)
'88 340 RC... I'll never tell... Okay, I might... ;-)
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NewDakOwener
Dodge Dakota
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9/01/2005
13:18:42
| Back O2 sensor problem
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V-6 1998 --Actually it may not be the sensor. I got a code indicating that the exhaust O2 sensor was bad. I replaced it and drove about 100 miles and got a "check engine" light. The code came up for a bad exhaust O2 sensor again. The sensor was under warranty so I got another new one. I put it in and drove a couple of miles and the "Check Engine" light came on again. The Code is for the exhaust O2 sensor. I am now checking the wiring for problems.
Does anyone have a good hint on where to look for the solution to this problem?????
NewDakOwner
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