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Unread 10-10-2010, 06:05 PM   #16
Jeeeps
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I'm going to replace my o2 sensors because i've been getting higher fuel usage lately plus the fact i've done 140,000klm with the factory ones. My only problem is which ones to go for. I've had a look around the web and come the conclusion that 1997-1999 TJ's have 2 o2 sensors which are:

Pre Cat NTK #231151
Post Cat NTK #23099

2000+ TJ's supposedly have 4x o2 sensors. 2000 TJ's sensor list:

Rear Pre-Cat upstream NTK #23506
Rear Post-Cat downstream NTK #23099
Front Pre-Cat upstream NTK # 23099
Front Post-Cat downstream # 23110

2001-2003 are listed as:

Front Pre-cat NTK #23139
Front Post-cat NTK #23142
Rear Pre-cat NTK #23138
Rear Post-cat NTK #23141

And then there's another 4 different part numbers for 2004+ TJ's.

My problem is than according to my VIN# mine's a 2002 (which makes sense seeing as i bought it new from the dealer in 2002) however i can only find 2x o2 sensors. I don't seem to have any little cat converters up near the headers that i know later models supposedly had. I can only find 2x sensors in the exhaust system located before and after the cat converter which is located down above the t-case bashplate.

Does this mean that i should go with the 97-99 model o2 sensors as those years appear to be the only ones in the US that only had 2x o2 sensors?

Has anyone else had this issue? Can anyone else with a 2002 TJ confirm that they've only got 2x o2 sensors or is my TJ a weird one? Mine was bought new in australia and is a right hand drive TJ. Perhaps because it's an export there is a difference?

cheers

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Unread 11-29-2010, 02:43 PM   #17
2004JeepTJ
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Thank you to the original poster and the others who have shared the info. here. Thank you! Very helpful explanations in this thread.
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Unread 11-29-2010, 11:46 PM   #18
DanZ51
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This is great info!

IFAIK, all the O2 sensors are the same: 4 wire - heated. The real differences are the wire pigtail (wire) lengths and the manufacturer's plug connection. There are other minor differences like connector color and wire cover material.
I would not use a "unversal" sensor that requires you to splice the wires to your old connector.

More Information for DENSO 2344588

I used Denso when I had to replace one of mine, here's what I found:

DENSO Part # 2344588 OE Style 17.99" lead
Front (Upstream); Cylinder 1,2,3

DENSO Part # 2344587 OE Style 11.81" lead
Front (Upstream); Cylinder 4,5,6

DENSO Part # 2344771 OE Style 11.81" lead
Rear (Downstream); Cylinder 1,2,3

DENSO Part # 2344768 OE Style 18.19" lead
Rear (Downstream); Cylinder 4,5,6
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Unread 12-26-2010, 09:39 AM   #19
tiger-bailey
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Here are the 2005/2006 Mopar part numbers:

before - 56028995AB
before - 56028994AB
after - 56029049AA
after - 56029050AA
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Unread 01-31-2011, 10:42 AM   #20
UltimateCC
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I have p2096 and p0133 code coming up in my 2005 jeep wrangler unlimited and I changed the bank1/sensor1 02 with a bosch 15123 (reset the codes after replacing) and 75 miles later the same exact codes popped up? Anyone have any idea what I should do next to try and resolve this issue?
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Unread 01-31-2011, 10:49 AM   #21
biffgnar
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Quote:
Originally Posted by UltimateCC View Post
I have p2096 and p0133 code coming up in my 2005 jeep wrangler unlimited and I changed the bank1/sensor1 02 with a bosch 15123 (reset the codes after replacing) and 75 miles later the same exact codes popped up? Anyone have any idea what I should do next to try and resolve this issue?
Put in a Mopar sensor. I had exactly the same thing happen with that Bosch universal crap (and if you do some searches plenty of other people did too).
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Unread 02-02-2011, 05:13 PM   #22
UltimateCC
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I put the Mopar sensor in and p0133 code went away but the p2096 came back. So i reset it again and now both came back. I am lost on what I should do now and I have gotten two tickets for having expired inspection already. Any help would be greatly appreciated.

Thanks
Dan
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Unread 02-04-2011, 12:49 PM   #23
speed_phreak
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Quote:
Originally Posted by UltimateCC View Post
I put the Mopar sensor in and p0133 code went away but the p2096 came back. So i reset it again and now both came back. I am lost on what I should do now and I have gotten two tickets for having expired inspection already. Any help would be greatly appreciated.

Thanks
Dan
I don't know if it makes you feel any better, but I am in the same boat... I have a 2005 RME with 34,000 and I have both codes. I don't have to go through emissions testing until June, but I am going to replace both O2 sensors and try to get to the bottom of this early...

So far I have done:

1.) I have been running a through some Techron with the overdrive off (auto) in case there was some kind of buildup to no avail.

2.) Had a buddy clean the throttle body and idle air controller.

I plan to:

1.) Replace both front O2 senors (pre and post cat) with Mopar replacements.
2.) Take a look at the spark plugs and see if they tell a story. Replace if necessary.
2.) Spray flammable aerosol (pb blaster maybe?) around the vacuum tubes to test for a vacuum leak.

Please pass on anything you find out about fixing your issue....
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Unread 02-04-2011, 02:20 PM   #24
DanZ51
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If your O2 sensor is good, that really only leaves and exhaust leak or a bad cat.
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Unread 02-04-2011, 05:35 PM   #25
kenmal
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Just replaced all 4 of mine, only one downstream gave me trouble used NTK ( Ngk ) ofcoarse.
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Unread 02-05-2011, 01:17 PM   #26
DanZ51
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Quote:
Originally Posted by kenmal View Post
Just replaced all 4 of mine, only one downstream gave me trouble used NTK ( Ngk ) ofcoarse.
That brings up an interesting theory: I wonder if the difference (as apposed to certain values) between the upstream O2 sensor and the downstream O2 sensor is what triggers a MIL. Could perhaps having different manufacturer sensors (with slightly different outputs) compound this problem? It would be interesting putting different O2 sensors on a test stand to see how they compare with one-another.

When working at Volvo dealership (way back when) we would get blown bulb indicator coming on. Replacing the bad bulb sometimes did NOT always correct the indicator, and we would frequently have to replace both Right and Left side bulbs (to equal the voltage draw?) to get the indiactor lamp to go out. I never really researched why this would work this way, just knew the fix.

Now, granted the O2 sensor is providing input for a far more sophisticated module, but it would be valuable to know why some of us are having re-occuring problems with O2 sensors. For the record: I replaced my bank 1, downstream sensor with a Nippon Denso IIRC and never had another hiccup.
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Unread 02-08-2011, 03:07 PM   #27
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Is there a mopar part number for the Downstream, Front Manifold - Bank One, Sensor Two for 2005-2006 jeep wrangler?
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Unread 02-14-2011, 06:05 AM   #28
wgourley
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any chance anyone knows the mopar part #'s for 2005 wrangler? my light came on a few times in the last few weeks. i got a couple long road trips ahead of me in the new fext months so i am replacing them all so i dont have to deal with it on the road.

thanks for the help.
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Unread 02-14-2011, 01:27 PM   #29
DanZ51
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Quote:
Originally Posted by wgourley View Post
any chance anyone knows the mopar part #'s for 2005 wrangler? my light came on a few times in the last few weeks. i got a couple long road trips ahead of me in the new fext months so i am replacing them all so i dont have to deal with it on the road.

thanks for the help.
Try here, download the parts manual.

http://www.acrobatplanet.com/manual-...-s-manual.html

I wouldn't get too hung up on the Chysler-Jeep part specifically. Jeep doesn't make the sensor, they buy it from a another manufacture (although I would avoid Bosch sensors like the plague).
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Unread 02-14-2011, 01:38 PM   #30
wgourley
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Well I already ordered them through the local Chrysler/jeep dealer. They had 2 in stock and had to order 2. The only distinguishing thing I have are the part numbers on the bag they’re in. the dealer told me the electrical connectors would be different but the 2 I have already are have the same connectors.
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