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Unread 11-13-2011, 07:09 PM   #46
crsifers
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Quote:
Originally Posted by bonza
does any one know what size socket to use?
Mine was 22mm

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Unread 11-14-2011, 12:39 AM   #47
oakmckinley
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For what it's worth my 2000 4.0 has just 2 sensors (no mini cats), and I used Bosch and they've been fine.
$0.02
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Unread 12-22-2011, 10:35 AM   #48
rockspyder
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Quote:
Originally Posted by oakmckinley View Post
For what it's worth my 2000 4.0 has just 2 sensors (no mini cats), and I used Bosch and they've been fine.
$0.02
Glad I read this post. How long have your Bosch sensors been in?

I just replaced the exhaust system on my '97TJ, from (cracked but welded) header all the way back to the exhaust tip. We put the original sensors (yes, nearly 15 years old and never had a problem) back in, and two trips later they started throwing codes.

First time it happened I got a P0135P and a P0138 (no P). The MIL had lit just after it ran a little rough. BTW, what does that second P mean in the "P0135P"?

Reset the codes (with code reader).

I checked the codes again this morning after coming in to work, because I got a rough run pulling out after the engine had been running about 2 or 3 minutes. No MIL light, but I checked anyway, and got a P0138P.

Anyway, I've got the 1/1 and 1/2 Bosch sensors but haven't installed them yet -- although now I'm wondering if I need to check the part numbers against this thread before I try to install them. Or even trade them in on a different brand, although after reading this last post, I probably won't unless the part numbers are wrong.

I was hoping it would sort itself out after the "newness" of the pipes burned off, but I'm guessing that isn't going to be the case.
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Unread 12-22-2011, 06:55 PM   #49
luisi
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Got my sensors replaced but the found out exhaust manifold is cracked so if im gunna redo my exhaust sys what would be most cost effective?
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Unread 12-22-2011, 07:02 PM   #50
rockspyder
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I welded up my header for the short term. Much easier. I know I'll have to replace it sooner than later, but with financial commitments lately, I decided to take a chance on it if it only last a few months.
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Unread 12-23-2011, 08:19 AM   #51
crsifers
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I've had my Bosch in for about 2 months. No problems yet (as I knock on wood).

Sent from my T-Mobile G2 using JeepForum
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Unread 01-02-2012, 08:42 PM   #52
Saisling
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I replaced both my "pre" sensors with Bosch as they were only $19 a piece at the local NAPA and needed to get through emissions. Installation took all of about 10 minutes. Drove to Emissions station the next day, passed, then an hour later the rear sensor started throwing a code again. ...So not even 24hours on that Bosch one. So far, the front Bosch sensor hasn't thrown another code. That was... er.... 4-6 months ago I need to replace that Bosch sensor, but I just haven't bothered to do it yet.
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Unread 01-16-2012, 06:34 PM   #53
MsGTI
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Thank you for this thread..this morning as I was starting my Jeep up the check engine light came on.
It was very cold this morning and I haven't driven it since Friday.

Code P0132 came up after I did the *wiggle-key-thingy-3x*

I just replaced the 02 sensors last Thanksgiving at the dealership (code P0156).

Very informative and now I know where all these sensors are,thanks to the diagram
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Unread 02-21-2012, 06:12 PM   #54
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Quote:
For what it's worth my 2000 4.0 has just 2 sensors (no mini cats)
I am pretty sure I only have 2 also. I want to order from RockAuto. Do I go with the part numbers for 99's? The numbers are different.
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Unread 02-21-2012, 08:52 PM   #55
26679cj5
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2000 was the cross over year on the sensors and emissions system. Earlier 2000's had the 2 sensor system, later 2000's had the california emissions which is 4 sensors.
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Unread 02-22-2012, 05:42 AM   #56
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^^^ so what year do I go with for the sensors? They are only $39 from RockAuto compared to almost $100 at the dealership.
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Unread 02-22-2012, 09:09 AM   #57
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if you go to advance auto parts website and search for oxygen sensors for your 2000 tj, you'll see that they have four parts listed for NTK's. Two of them will say california emissions and two of them won't be.
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Unread 02-22-2012, 09:33 AM   #58
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Thanks 26679cj5 . I guess the ones that say "exc. Calif" are what I need.
I don't have any codes, but my gas mileage has gone done and I can't find any other issues. At 120K miles I am assuming it is time. How necessary is replacing the post cat sensor? I was only planning on replacing the pre-cat one.
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Unread 05-03-2012, 03:07 PM   #59
chebbyfan
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Quote:
Originally Posted by Pillswoj View Post
Napa carries the NTK's which were OEM in the TJ.
Is it N "T" K or N "G" K? My NAPA says its NGK that they have and it even lists it as the OE sensor.
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Unread 05-03-2012, 03:17 PM   #60
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The box says NTK, but it is made by NGK so same difference.
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