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Unread 12-13-2013, 09:07 AM   #1
Deadhorse
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Bank 1 & 2, sensor 1 & 2????

I know I've posted about this today already but I really need to get this figured out. I need 2 O2 sensors, bank1 sensor one and bank 2 sensor 2. I'm pretty sure bank 1 is upstream and 2 downstream but am having trouble confirming front and rear? Can anyone clarify?

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Unread 12-13-2013, 09:07 AM   #2
Deadhorse
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Sorry it's an 04 Limited 6 cyl.
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Unread 12-13-2013, 09:11 AM   #3
ChrisHager
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Oh I didn't realize you had the 4.0. In that case:

Bank 1 Sensor 1: 1/1
Bank 1 Sensor 2: 1/2
Bank 2 Sensor 1: 2/1
Bank 2 Sensor 2: 2/2



Before cat:

56028995AA

56028994AA

After cat:

56028997AA

05139021AA

From: http://wjjeeps.com/oxygen.htm

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Unread 12-13-2013, 09:25 AM   #4
Deadhorse
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Chris, thanks again. From the description in your link I believe the 1/1 is the front upstream and the 2/2 is the rear downstream.
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Unread 12-13-2013, 09:28 AM   #5
ChrisHager
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I concur.
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Quote:
Originally Posted by alfaitalia View Post
"Wind them in until you strip the thread....then back a quarter turn!"
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Unread 12-13-2013, 09:36 AM   #6
Deadhorse
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Oh one more thing, how did you know it's the 4.0 just by me saying it's a 2004 Limited, 6cyl?
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Unread 12-13-2013, 09:53 AM   #7
ChrisHager
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Unless you've done an engine swap...

6cyl A.K.A. Inline 6 is 4.0L in all WJ's.
8cyl A.K.A. V8 is 4.7L in all WJ's.

Those are the only two engine sizes offered for WJ's from the factory. They offer two versions of the 4.7 but ultimately, it's still a 4.7.

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Quote:
Originally Posted by alfaitalia View Post
"Wind them in until you strip the thread....then back a quarter turn!"
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Unread 12-13-2013, 09:59 AM   #8
Deadhorse
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Good to know.
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