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number of o2 sensors in a 2000

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Old 02-05-2011, 08:14 AM   #1
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Default number of o2 sensors in a 2000

i can find one but i thought that there was another one behind the cat, and there isnt. is there only one o2 sensor in a 2000 Cherokee Sport?
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Old 02-05-2011, 08:47 AM   #2
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Either 2 or 4, depending on if it is a Federal or CA emissions pkg.

But definitely NOT 1.

You missed the post cat sensor, unless somebody removed it.
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Old 02-05-2011, 09:12 AM   #3
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Either 2 or 4, depending on if it is a Federal or CA emissions pkg.

But definitely NOT 1.

You missed the post cat sensor, unless somebody removed it.
there is about 4 inchs of pipe after my cat then it goes to my aftermarket muffler, and im not seeing a o2 sensor or even a hole for one after the cat.
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Old 02-05-2011, 09:52 AM   #4
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upstream on the exhaust manifold
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Old 02-05-2011, 10:11 AM   #5
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upstream on the exhaust manifold
yeah thats the only one that i can find
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Old 02-05-2011, 10:22 AM   #6
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Then someone has put in a Cat without a port for it. You should have one right behind it.
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Old 02-05-2011, 11:02 AM   #7
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Look under it from the drivers side.
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Old 02-05-2011, 11:15 AM   #8
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So if there are 4 it means the XJ is a CA emissions package? I've got a 2001 with 4 O2 sensors. I'm pretty sure the vehicle was originally sold from a dealership in IN.
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Old 02-05-2011, 11:18 AM   #9
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Look under it from the drivers side.
not seeing anything...
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Old 02-05-2011, 11:39 AM   #10
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As 49erRider said, sounds like You have a replacement cat without an o2 sensor. Hopefully the PO did not cut the wire harness.
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Old 02-05-2011, 11:41 AM   #11
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Yup, your system is not factory.

Is your check engine light on??
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Old 02-05-2011, 11:43 AM   #12
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Yup, your system is not factory.

Is your check engine light on??
yeah. ive had it for about a year. it started turning on during the winter, checked at autozone, said cyl. 3 was miss firing, i pulled all the plugs and cleaned them and regapped them.

were would the wires be for the o2 sensor?
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Old 02-05-2011, 11:48 AM   #13
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Gotta get under it and start lookin'. There's a factory wiring plug-in up high, unless that's been ripped out/cut too.
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Old 02-05-2011, 11:50 AM   #14
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Gotta get under it and start lookin'. There's a factory wiring plug-in up high, unless that's been ripped out/cut too.
alright i will look for an open plug underneath
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Old 02-05-2011, 11:50 AM   #15
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here's the o2 sensor on my 2000 xj

Last edited by DaddyCat; 02-05-2011 at 11:53 AM.
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