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Old 04-01-2012, 07:14 AM   #1
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Oxygen sensor

Hi guys, where can I buy some o2 sensor online. I have a 05 wrangler 4.0L I6 with auto tran. Can't find it on quadratec.com.

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Old 04-01-2012, 07:16 AM   #2
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Old 04-01-2012, 12:18 PM   #3
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I got mine from O'Riely. I purchased the Bosch ones. Get the ones with the proper wire harness, it's worth the extra few bucks.
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Old 04-01-2012, 12:29 PM   #4
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Advanced autos online store and google coupon codes for them. In saved 40% I think it took te cost from 75 to 40 or something.
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Old 04-01-2012, 12:34 PM   #5
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o-no



Quote:
Originally Posted by GoldenSahara00 View Post
Advanced autos online store and google coupon codes for them. In saved 40% I think it took te cost from 75 to 40 or something.
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Old 04-01-2012, 05:12 PM   #6
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Jeeps seem to like the NTK brand o2 sensor best
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Old 04-01-2012, 06:37 PM   #7
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^^^ That. Bosch and Jeep don't usually work out to well...
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Old 04-01-2012, 07:41 PM   #8
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Quote:
Originally Posted by DevilDogDoc
^^^ That. Bosch and Jeep don't usually work out to well...
I however used Bosch and had no issue. And it's been prob 3k miles so far. I dunno. What could make a difference.
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Old 04-01-2012, 07:52 PM   #9
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Quote:
Originally Posted by GoldenSahara00

I however used Bosch and had no issue. And it's been prob 3k miles so far. I dunno. What could make a difference.
I've got a bosch in my upstream on mine right now (almost 13000 miles) and every once and a while it'll throw a code dunno. I'll replace it with NTK next time
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Old 04-01-2012, 07:54 PM   #10
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I replaced mine last weekend with NTK from napa.Went from an average of 230ish to 290 from this last fill up!
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Old 04-01-2012, 08:16 PM   #11
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Quote:
Originally Posted by Thesnufalufagus
I replaced mine last weekend with NTK from napa.Went from an average of 230ish to 290 from this last fill up!
Yours must have went really bad and was screwing with your computer. Your saying you gained 4 mpg. 15-19. That's insane.
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Old 04-01-2012, 08:17 PM   #12
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Quote:
Originally Posted by wwch99tj

I've got a bosch in my upstream on mine right now (almost 13000 miles) and every once and a while it'll throw a code dunno. I'll replace it with NTK next time
I don't get what could cause a problem. A sensor is a sensor isn't it?
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Old 04-01-2012, 08:22 PM   #13
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Quote:
Originally Posted by GoldenSahara00

I don't get what could cause a problem. A sensor is a sensor isn't it?
You'd think, my original lasted 214k I consistently got 320+ a tank. I had to replace it because I tore the wires installing a new engine, with Bosch it only been getting like 275 on the same 16 gallons
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Old 04-01-2012, 08:55 PM   #14
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Quote:
Originally Posted by wwch99tj

You'd think, my original lasted 214k I consistently got 320+ a tank. I had to replace it because I tore the wires installing a new engine, with Bosch it only been getting like 275 on the same 16 gallons
That's weird. Mine stayed the same. So go knows. Maybe upstream matters more than down stream. Mine was the lower
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Old 04-01-2012, 09:00 PM   #15
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Yea i believe the upstream tells the computer if its running rich or lean and adjusts the fuel accordingly
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Old 04-01-2012, 09:34 PM   #16
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Quote:
Originally Posted by wwch99tj
Yea i believe the upstream tells the computer if its running rich or lean and adjusts the fuel accordingly
Makes sense
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Old 04-01-2012, 09:38 PM   #17
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From what I understand the Bosch heats up too slow for the Jeep ECM, which causes issues and codes and whatnot. Upstream controls mixture and such, the one in the cat only tells the ECM that the cat is bad. And believe it, a bad 02 sensor can really mess up your mileage.....
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Old 04-01-2012, 09:47 PM   #18
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Quote:
Originally Posted by DevilDogDoc
From what I understand the Bosch heats up too slow for the Jeep ECM, which causes issues and codes and whatnot. Upstream controls mixture and such, the one in the cat only tells the ECM that the cat is bad. And believe it, a bad 02 sensor can really mess up your mileage.....
I believe the front but I can't see the rear doing it at all.
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Old 04-01-2012, 11:40 PM   #19
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No, the rear one only tells the ECM that the cats not working anymore. It's only looking for a different reading than the front one, it shouldn't affect performance at all.
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Old 04-02-2012, 06:30 AM   #20
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Quote:
Originally Posted by DevilDogDoc
No, the rear one only tells the ECM that the cats not working anymore. It's only looking for a different reading than the front one, it shouldn't affect performance at all.
Yes, of course. I thought you guys were trying to say both mattered before. Doh.
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Old 04-02-2012, 08:30 AM   #21
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It was o2 sensor 1 bank 2 so yea it was causing my jeep to stay stuck in open loop just dumping fuel into the cylinder causing it to turn really rich
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Old 04-02-2012, 08:59 PM   #22
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What are the part number of upstream and downstream O2 sensor for 05 wrangler 4.0L auto tran?
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Old 04-02-2012, 10:34 PM   #23
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The ones I found on Advance Auto were NTK sensors:

P/N 23018 Pre-catalyst Front
P/N 23159 Post-catalyst Front
P/N 23160 Pre-catalyst Rear
P/N 23158 Post-catalyst Rear

Hope these help a little
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Old 04-03-2012, 10:25 AM   #24
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I believe I only have two o2 sensor on my jeep. Correct me if I'm wrong. Mine is Asia version as in right side driving. As far as I know only California built jeep has four o2 sensor. Right?
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Old 04-03-2012, 11:08 AM   #25
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You'll have to get under in and look I'm pretty sure you have a 2 piece exhaust manifold, so you will have to pre cat 02 sensor for sure. You might only have 1 post cat but you have to check that I'm not too sure
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Old 04-03-2012, 11:24 AM   #26
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Quote:
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Jeeps seem to like the NTK brand o2 sensor best
X2. Just put my two up-stream sensors in my 05. They go in a little easier than the Bosch in my opinion. Purchased at NAPA for $36.00
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Old 04-03-2012, 03:31 PM   #27
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If there is a prob with the o2 sensor would you see it with the check eng light? I'm only gettin bout 14 mpg in an 06 Rubi turnin 285x75's. Only a 1" body lift. Just bought it...
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Old 04-03-2012, 03:35 PM   #28
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Quote:
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If there is a prob with the o2 sensor would you see it with the check eng light? I'm only gettin bout 14 mpg in an 06 Rubi turnin 285x75's. Only a 1" body lift. Just bought it...
If your check engine light is on...
Turn the key on-off-on-off-on leave it on the 3rd time the odometer will display any codes. 14 miles to the gallon seems a little low so you might wanna replace the upstream o2 sensors
Edit
Has your speedo been corrected for the larger size tires?
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Old 04-03-2012, 03:54 PM   #29
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Not that I know of. I thinks it's bout 7 mph off ( following my wife ). Will that do it too? How do I correct it?
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Old 04-03-2012, 03:55 PM   #30
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Oh, and the check engine light is not on.

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