number of o2 sensors in a 2000

rtralabama · 02-05-2011, 08:14 AM

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 · 02-05-2011, 08:47 AM

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 · 02-05-2011, 09:12 AM

Quote:

Originally Posted by 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.

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 · 02-05-2011, 09:52 AM

upstream on the exhaust manifold

rtralabama · 02-05-2011, 10:11 AM

Quote:

Originally Posted by thorguy57

upstream on the exhaust manifold

yeah thats the only one that i can find

49erRider · 02-05-2011, 10:22 AM

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

djb383 · 02-05-2011, 11:02 AM

Look under it from the drivers side.

Burgy · 02-05-2011, 11:15 AM

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 · 02-05-2011, 11:18 AM

Quote:

Originally Posted by djb383

Look under it from the drivers side.

not seeing anything...

DaddyCat · 02-05-2011, 11:39 AM

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

tjwalker · 02-05-2011, 11:41 AM

Yup, your system is not factory.

Is your check engine light on??

rtralabama · 02-05-2011, 11:43 AM

Quote:

Originally Posted by tjwalker

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?

djb383 · 02-05-2011, 11:48 AM

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 · 02-05-2011, 11:50 AM

Quote:

Originally Posted by 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.

alright i will look for an open plug underneath

DaddyCat · 02-05-2011, 11:50 AM

here's the o2 sensor on my 2000 xj

02-05-2011, 08:47 AM	#2
tjwalker CF Veteran Garage is empty, add now Join Date: Nov 2010 Location: In the middle of Minnesota! Posts: 4,291 My Photos 1999 Cherokee Engine: 4.0 Transmission: AW4 Transfer Case: NV242 Lift Specifications: No lift. Bone stock	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. __________________ Without data, all you have is an OPINION! Past Jeeps: '49 Willys, '81 Scrambler, '88 Comanche Current Jeep: 1999 XJ Sport, bone stock, daily driver. I work on Jeeps!!

02-05-2011, 11:02 AM	#7
djb383 CF Veteran Garage is empty, add now Join Date: Nov 2009 Location: The Republic of TEXAS Posts: 6,018 My Photos 1998 Cherokee Engine: 4.0L HO Transmission: Auto w/B&M 70264 auxiliary cooler Transfer Case: N/A Rear Axle: 3.55 PowerTrax No-Slip locker Tires: 235/70/15 Lift Specifications: Stock Misc Accessories: Magnaflow 2.5" exhaust	Look under it from the drivers side. Attached Thumbnails

02-05-2011, 11:15 AM	#8
Burgy Seasoned Member Garage is empty, add now Join Date: Oct 2009 Location: Indianapolis, IN Posts: 275 My Photos 2001 Cherokee Engine: 4.0 Transmission: AW4 Transfer Case: NP231 Front Axle: Dana 30 Rear Axle: Chrysler 8.25 Tires: 245/75/16 Goodyear MTR Lift Specifications: 2" Old Man Emu HD Springs and a 2" Rusty's Coil Spacers Misc Accessories: Rubicon Moab Wheels, Goodyear MTRs, Neon Fuel Injectors, Yakima Rack, ZJ Disc Brakes, Rampage H4s	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. __________________ "The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first, the love of soft living and the get rich quick theory of life." ~Theodore Roosevelt

02-05-2011, 11:39 AM	#10
DaddyCat Senior Member Garage is empty, add now Join Date: Jan 2011 Location: N. IL Posts: 799 My Photos 2000 Cherokee Engine: 4.0 Transmission: Auto Transfer Case: NP242 Tires: 235/75/15 Lift Specifications: Stock	As 49erRider said, sounds like You have a replacement cat without an o2 sensor. Hopefully the PO did not cut the wire harness. __________________ Joe __________________ Thank you men and women of the U.S. military. http://www.military.com/benefits/res...ort-our-troops

02-05-2011, 11:41 AM	#11
tjwalker CF Veteran Garage is empty, add now Join Date: Nov 2010 Location: In the middle of Minnesota! Posts: 4,291 My Photos 1999 Cherokee Engine: 4.0 Transmission: AW4 Transfer Case: NV242 Lift Specifications: No lift. Bone stock	Yup, your system is not factory. Is your check engine light on?? __________________ Without data, all you have is an OPINION! Past Jeeps: '49 Willys, '81 Scrambler, '88 Comanche Current Jeep: 1999 XJ Sport, bone stock, daily driver. I work on Jeeps!!

02-05-2011, 09:52 AM	#4
thorguy57 Member Garage is empty, add now Join Date: Nov 2010 Location: Tooele, Utah Posts: 224 My Photos 1998 Cherokee Engine: 4.0 Transmission: Auto	upstream on the exhaust manifold

02-05-2011, 10:22 AM	#6
49erRider Member Garage is empty, add now Join Date: Oct 2010 Location: Tega Cay, SC Posts: 118 My Photos 2000 Cherokee Engine: Inline 6 Transmission: Aw4 Transfer Case: 231 Front Axle: D30 Rear Axle: 8.25 Tires: Stock Lift Specifications: Stock Misc Accessories: Stock	Then someone has put in a Cat without a port for it. You should have one right behind it.

02-05-2011, 11:48 AM	#13
djb383 CF Veteran Garage is empty, add now Join Date: Nov 2009 Location: The Republic of TEXAS Posts: 6,018 My Photos 1998 Cherokee Engine: 4.0L HO Transmission: Auto w/B&M 70264 auxiliary cooler Transfer Case: N/A Rear Axle: 3.55 PowerTrax No-Slip locker Tires: 235/70/15 Lift Specifications: Stock Misc Accessories: Magnaflow 2.5" exhaust	Gotta get under it and start lookin'. There's a factory wiring plug-in up high, unless that's been ripped out/cut too.

02-05-2011, 11:50 AM	#15
DaddyCat Senior Member Garage is empty, add now Join Date: Jan 2011 Location: N. IL Posts: 799 My Photos 2000 Cherokee Engine: 4.0 Transmission: Auto Transfer Case: NP242 Tires: 235/75/15 Lift Specifications: Stock	here's the o2 sensor on my 2000 xj __________________ Joe __________________ Thank you men and women of the U.S. military. http://www.military.com/benefits/res...ort-our-troops Last edited by DaddyCat; 02-05-2011 at 11:53 AM.

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