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Unread 06-25-2014, 03:53 PM   #1
GringoLoco
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Need quick input, O2 sensor plugs wrong?

I can't remember the last time I got all the right parts and everything went smoothly. I have Cali emissions on my 2000 TJ, and I'm replacing all 4 O2 sensors with NTK ones from Rock Auto. I did bank 1, sensor 1 first. When I went to plug it in the new sensor plug won't mate up to the harness. In the picture, the old plug has the 2 tabs that stick out at about 12 and 3 o'clock, at a 90 degree angle to each other. The new plug they are at about 12 and 2 o'clock, so they won't mate up. The new sensor for bank 2 sensor 1 is like the old sensor so no problem there. If I'm not high, bank 1 is the front of the engine and bank 2 is the rear, right? And sensor 1 is upstream and 2 is downstream?

NTK part numbers I'm using are:
B1 S1 - 23099
B1 S2 - 23110
B2 S1 - 23506
B2 S2 - 23099

I triple checked these part numbers before ordering. Only thing I can think of is mine is a late 2000 production model year 2000. Could I have 2001 emissions on it? Wtf?



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Unread 06-25-2014, 04:00 PM   #2
Robbie13
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Just went through this same headache. I found that if I punched in a 99 cherokee, the numbers would be right.
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Unread 06-25-2014, 04:06 PM   #3
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Here is the part numbers i used. The 2 top ones (pre cat) are gray. The 2 post cats are black. Connectors I mean. I took the B1S1 off and took to the dealer and got a replacement for it. After that I crossed referenced that number to NTK. I found that if I used the 99 Cherokee, the numbers would match with what I had on my TJ. Hence my signature.

B1S1 =23151
B2S1 =23506
B1S2 =23110
B2S2 =23099
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Unread 06-25-2014, 04:21 PM   #4
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I also did the same as you. I ordered B1S1 NTK for a 2000 and it didn't fit. That's when i took the sensor out and took it to the dealer. They gave me the right one to fit. I went ahead and changed out the rest with the NTK part numbers I gave you. I crossed referenced all the ones I took out except for B1S2 because I couldn't read the numbers after having to use a torch and pipe wrench to get it out. On a side note, when I changed out my valve cover gasket it had 99 stamped on the cylinder head. I said ok, so I punched that into NTK and it still gave me the wrong O2 sensors. So, at this point I'm not sure what I have under the hood. Lesson learned, before replacing a part, I will remove it and get the part number off of it. I don't know what else to do.
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Unread 06-25-2014, 04:23 PM   #5
GringoLoco
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Quote:
Originally Posted by Robbie13 View Post
Here is the part numbers i used. The 2 top ones (pre cat) are gray. The 2 post cats are black. Connectors I mean. I took the B1S1 off and took to the dealer and got a replacement for it. After that I crossed referenced that number to NTK. I found that if I used the 99 Cherokee, the numbers would match with what I had on my TJ. Hence my signature.

B1S1 =23151
B2S1 =23506
B1S2 =23110
B2S2 =23099
OK, so that shows Bank 2 have the same parts for upstream and downstream as I bought and yeah my upstream are gray and downstream are black. But when I checked Rock Auto they only list upstream and downstream for a 99 Cherokee like it only has the 2, where did you get the numbers? I checked for a 2001 TJ and it was different from what you got. Do you know if yours is also a late 2000 build? Mine is from March 2000.
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Unread 06-25-2014, 04:24 PM   #6
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Posted slow, thanks for the help. Time to see how cool Rock Auto is with returns, and if I managed to damage my old B1S1 getting it out.
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Unread 06-25-2014, 04:26 PM   #7
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That's cool you have a 99 head, maybe you won't have to worry about it cracking like everyone else with a 2000 lol. I don't feel like messing with the stealership, I think I'll order the 2 different ones you list for Bank 1 and hope it works haha.
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Unread 06-25-2014, 04:29 PM   #8
Robbie13
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Basically I just crossed referenced the Mopar part numbers on the sensors to the NTK website. For some reason i decided to try a 99 Cherokee with the CA emissions and it pulled it up. I got mine from my local Advance Auto. They did take back the original B1S1 I got from them. On there site (NTK) if I remember correctly, it will give you a pic of the connector and length of the wire.
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Unread 06-25-2014, 04:31 PM   #9
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I dealt with issues like this with front brake rotors. I think 2000 was the equivalent of "Chef's Surprise" as they were clearing out odd spare parts. Thanks Chrysler.
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Odd noises
Still can't get it to take off from a treadmill....
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Unread 06-25-2014, 04:32 PM   #10
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I should probably try to get my numbers before just buying. Just don't want to kill any, still need the Jeep until the new ones come in.
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Odd noises
Still can't get it to take off from a treadmill....
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Unread 06-25-2014, 04:37 PM   #11
Robbie13
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Know how you feel! I even called the guy I bought this one from and asked him had the motor been swapped! All the part numbers I pull off this engine just don't make any sense to what it is supposed to be. I feel from your description it is the same thing I went through. Maybe it will save you some head scratching at the least. I already did that.
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Unread 06-25-2014, 05:12 PM   #12
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Hey! I may have steered you wrong. I looked back at my notes and I punched in a 2000 Cherokee Sport in the NTK website. My bad. Anyway, check that. Sorry about that....
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Unread 06-25-2014, 05:17 PM   #13
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I had sensor issues too. The crank sensor I got from RA was incorrect and I cross referenced it to several different web sites. The last time I had to return a part to RA they told me to just throw it away and they refunded my money.
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Unread 06-25-2014, 07:42 PM   #14
GringoLoco
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I can see them on the assembly line, having supply issues because it was the first year for Cali emissions. "Hey Jim, I'm outta bank 1 O2 sensors!" "Just steal some from the Cherokee line, same ****!"
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No hi-lift on the hood (yet)
Odd noises
Still can't get it to take off from a treadmill....
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Unread 07-06-2014, 08:48 PM   #15
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Update, after USPS took my sensors on a tour of California they finally brought them here. The front bank sensors you used have the right plugs for mine, so hopefully this is it. I'm almost afraid to ask, but if they plug up ok but are still the wrong sensor, could it make my engine run too lean and burn it up?
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13 mpg - edit: 12 mpg
No hi-lift on the hood (yet)
Odd noises
Still can't get it to take off from a treadmill....
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