The Official Jeep Wrangler TJ Oxygen (O2) Sensor Thread
- Thread starter Chris
- Start date
Either these, if you can find them still in stock. NGK/NTK has discontinued making them so they are limited to supply still on hand at various resellers... Or if you can't find them use the Walker's that are listed as direct replacements for the NTK...
NTK-23179 (x2)
NTK-23506 (x1)
NTK-23110 (x1)
2000 (California Emissions)
NTK #23179 - Bank 1, Sensor 1 (Upstream) Rock Auto shows they have this one
NTK #23506 - Bank 2, Sensor 1 (Upstream) Rock Auto shows they have this one.
NTK #23110 - Bank 1, Sensor 2 (Downstream) Rock Auto shows they have this one
NTK #23179 - Bank 2, Sensor 2 (Downstream) They also show that the 23110 can be replaced with the 23179...
https://www.rockauto.com/en/parts/ntk,23179,oxygen+(o2)+sensor,5132
https://www.rockauto.com/?mfr=NTK&partnum=23506
https://www.rockauto.com/en/partsearch/?mfr=NTK&partnum=23110
Rock auto doesnt have the 23506 ntk. It says 23179 is compatible with all of them.
Didn't catch that they substituted it for the 23506, woops...
Well, I guess you have your answer then...
Or go with Walker.
| WALKER PRODUCTS 25024942 OEM Based Info Fits Downstream; Cylinder 4-6or Downstream; Cylinder 1-3or Upstream; Cylinder 4-6or Upstream; Cylinder 1-3, Non California Emissions |
| WALKER PRODUCTS 25024943 OEM Based Info Upstream; Cylinder 1-3, California Emissions |
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$32.79
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Alliance2000
New Member
Update:
What I did until now:
1.) replaced all 4x O2 sensors (NGK/NTK)
2.) replaced PCM (WranglerFix)
3.) installed new spark plugs (NGK/NTK)
4.) installed new fuel filler cap (OEM from Chrysler)
5.) fixed broken vacuum hose (that leads to the air distribution console in the dashboard)
6.) checked exhaust for leaks - didn't find any (only a small one in the muffler)
7.) installed MiniCatalyzador adapters for the downstream O2 sensors to check if errors remain
8.) applied TSB 25-001-07 (new wiring for a different power supply of ASD relay inside PDC)
All errors gone for 3 drive cycles and I got 3 of 4 tests completed nearly instantly. The "O2 sensor heater" test never completed until now - I think it was the TSB, so heavy recommended! Only missing the "evap" test right now.
Then, error P0133 "O2 sensor 1, bank 1, slow response" came back...
Anyone more ideas where this can come from?
What I did until now:
1.) replaced all 4x O2 sensors (NGK/NTK)
2.) replaced PCM (WranglerFix)
3.) installed new spark plugs (NGK/NTK)
4.) installed new fuel filler cap (OEM from Chrysler)
5.) fixed broken vacuum hose (that leads to the air distribution console in the dashboard)
6.) checked exhaust for leaks - didn't find any (only a small one in the muffler)
7.) installed MiniCatalyzador adapters for the downstream O2 sensors to check if errors remain
8.) applied TSB 25-001-07 (new wiring for a different power supply of ASD relay inside PDC)
All errors gone for 3 drive cycles and I got 3 of 4 tests completed nearly instantly. The "O2 sensor heater" test never completed until now - I think it was the TSB, so heavy recommended! Only missing the "evap" test right now.
Then, error P0133 "O2 sensor 1, bank 1, slow response" came back...
Anyone more ideas where this can come from?
Alliance2000
New Member
So can a bad catalytic converter throw a “slow response” code of an upstream o2 sensor…?
Pull your connectors apart and make certain they are clean and free of any corrosion. Slight build up on the pins can cause this.....
LRosatone
New Member
2025 here! My TJ is still going strong! Thank You for this info..
I have all 4 codes: P0031, P0037, P0051, and P0057 but will try sensor replacements first before looking at the PCM
I have all 4 codes: P0031, P0037, P0051, and P0057 but will try sensor replacements first before looking at the PCM
LRosatone
New Member
Do you have the ability to read live ODB data? A $30 Bluetooth ODB dongle and the free Torque Lite app will do it. You want to monitor the voltages of the O2 sensors and they should be trending below.9v.
-Mac
Bank 1 sensor 1 and Bank 1 sensor 2
Also known as up stream sensor and down stream sensor.
Than you for that. I’d preteen told 2 other combinations. I’ll get onto to Rockauto and get them ordered. So expensive in Australia.
Have you checked to see what the Walker replacements cost over there? So far people have seemingly had good luck with them.
Yeah they’re just as pricey. $44 ea for NTK through rockauto an $25 delivery.
So I’ve just double checked to see if I can find part numbers on my current sensors and going by the photos and what I can see they are the same sensor front and back. According to the manual these are for the rear. Now I’m even more confused 
Both have part number 56041 887AA
Both have part number 56041 887AA
And that's the fun of a 25 year old vehicle.
Never know if a previous owner hacked off and replaced a connector.
I'd definitely be checking live ODB data and monitoring voltage. Should range below .9v.
Might want to check wiring and expose some of your loom.
-Mac
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