rtralabama

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?

tjwalker

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.

rtralabama

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.

thorguy57

upstream on the exhaust manifold

rtralabama

yeah thats the only one that i can find

49erRider

Then someone has put in a Cat without a port for it. You should have one right behind it.

djb383

Look under it from the drivers side.

Burgy

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.

rtralabama

not seeing anything...

DaddyCat

As 49erRider said, sounds like You have a replacement cat without an o2 sensor. Hopefully the PO did not cut the wire harness.

tjwalker

Yup, your system is not factory.

Is your check engine light on??

rtralabama

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?

djb383

Gotta get under it and start lookin'. There's a factory wiring plug-in up high, unless that's been ripped out/cut too.

rtralabama

alright i will look for an open plug underneath

DaddyCat

here's the o2 sensor on my 2000 xj