o2 sensor replacement
07-27-2011, 08:08 PM
#1
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o2 sensor replacement
Ok... so i have a 1994 cherokee 4.0 litter high output, and i need to know where the sensors are.. pictures would help.. what i need for the job, etc. Thanks in advance!
07-27-2011, 09:50 PM
#3
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Year: '99
Model: Cherokee
Engine: 4.o
It is raining here so sorry no pick. But just fallow your exost from the header and at one or two locations (depending on what year). Wires will come out. Don't buy new. Pull them out and spray them with brake clean shake and repeat. The 4.0 is a dirty running motor and coats the 02's with carbon. Clean the carbon off the BB in the sensor and it will get a good reading.
07-27-2011, 10:05 PM
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Year: 1994
Model: Cherokee
Engine: 4.0 L/242 CID I-6 High Output MFI
I got a '94 and I can tell you that it has just one stock, upstream from cat, right below where the manifold connects to the pipe. Easily found from underneath vehicle. NTK is the only suggested replacement, as they are original equipment.
02-12-2013, 01:06 PM
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What do you think about cleaning the original one like brutalxj suggested?
02-12-2013, 01:54 PM
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Year: 1990 Laredo
Model: Cherokee
Engine: 4.0 Inline 6 Renix
90% of the time cleaning O2 sensor does not work if the sensor has over hundred thousand miles just replaced it
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03-22-2013, 11:34 AM
#8
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Year: 2001
Model: Cherokee
Engine: Jasper 4.0L
03-22-2013, 11:50 AM
#9
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Year: 2001
Model: Cherokee
Engine: Jasper 4.0L
03-22-2013, 02:00 PM
#11
Look for a sticker on your firewall driver's side. If its California emissions (two "upstream" or pre-cat and two "downstream" or post-cat sensors), it'll say on the sticker. If not its just one each.
Alternatively crawl under driver side door and look for two football shaped catalytic converters coming off of your exhaust manifold. If you have them then you're California emissions.
Then go to rockauto.com and order NTK brand. It's way cheaper than the auto parts store.
Alternatively crawl under driver side door and look for two football shaped catalytic converters coming off of your exhaust manifold. If you have them then you're California emissions.
Then go to rockauto.com and order NTK brand. It's way cheaper than the auto parts store.
03-22-2013, 02:05 PM
#12
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Year: 2001
Model: Cherokee
Engine: Jasper 4.0L
Look for a sticker on your firewall driver's side. If its California emissions (two "upstream" or pre-cat and two "downstream" or post-cat sensors), it'll say on the sticker. If not its just one each.
Alternatively crawl under driver side door and look for two football shaped catalytic converters coming off of your exhaust manifold. If you have them then you're California emissions.
Then go to rockauto.com and order NTK brand. It's way cheaper than the auto parts store.
Alternatively crawl under driver side door and look for two football shaped catalytic converters coming off of your exhaust manifold. If you have them then you're California emissions.
Then go to rockauto.com and order NTK brand. It's way cheaper than the auto parts store.
im pretty sure im not cali, so would you happen to know part #'s? or how many wires. its a 2001 XJ
Last edited by 93XJRTSmith; 03-22-2013 at 02:19 PM.
03-22-2013, 02:32 PM
#13
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Year: 2001
Model: Cherokee
Engine: 4.0L
If you have a 2001 then you have Cali emissions standard with 4 O2 sensors. And I'll even include a picture for free!
https://www.cherokeeforum.com/f2/200...ations-162445/
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