Question about 1994 Jeep Grand Cherokee

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How to install an 02sensor in my 94 jeep cherokee 6cl.

Failed inspection was told it was sensor by inspector. my mechanic said it is cat. that I don't have a sensor. Was told by one parts store that I had only one 02 sensor, other store said I have 2. Only then to be told one of them had to come from Dealer???????????? What now?

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Check this info: Jeep XJ - Sect 11 Exhaust System

Good luck

Posted on Nov 25, 2008

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Go under the car and look at the exhaust pipe coming off the manifold. Your car does have a sensor. The sensor is screwed into the pipe and it has wires coming off of it. Cats. do not fail, sensors do.

Posted on Nov 25, 2008


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2001 volkswagon jetta n. j. inspection failed for unsupported for the emission what is that?

mrans that thedealer has no idea so go to an accredited service center that has experience on your make of car and have it fixed properly
could be an oxygen sensor after the cat converter, heated oxygen oxygen sensor before the cat converter or a wiring problem

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89 jeep cherokee failed smog -southern california- told me to much unburned fuel- co-max 0.93 ave0.10 meas 1.56 and no- max 875 ave 217 meas 980 those are the results just changed cat and 02 sensor any...

Does you engine sound like it has an exhaust leak under the hood? 89 4.0 litres were NOTORIOUS for the exh manifold cracking between #5 and # 6 cylinders. If this is the case, the O2 sensor is not seeing the proper amount of exhaust, and it will send the fuel injectors a richer condition than needed.

Sep 23, 2008 | Jeep Cherokee Cars & Trucks

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My car was rejected for inspection bc my CHECK ENGINE LIGHT doesn't light!! i can't believe they picked up on this.....when i turn the key one click right before i start my engine, all the indicators...

My guess is bulb or wire if you just bought the truck. The last owner may have failed inspection because the check engine light was on and cut the power wire or pulled the bulb hoping to fool the inspector.

Mar 14, 2011 | 2001 Jeep Grand Cherokee

1 Answer

I put in a new battery. I went to get it inspected and it failed. The inspector said I needed to drive it about a hundred miles before the computer will reset. Then bring it back and have it inspected...

Once disconnected from the battery the computer needs to go through a drive cycle during which it does internal testing of the sensors. Generally that only takes a trip of about twenty or so miles. The inspector probably told you one hundred just to be on the safe side. Most times, you don't need to make the trip all at once but over the period of about a week, driving normally, with a few longer trips mixed in, everything should re-set.

Feb 15, 2011 | 2001 Jeep Grand Cherokee

2 Answers

I'm trying to solve a fail to pass the smog test In California. The mechanic change O2 sensor, Temp Sensor, sparks, cable. gas filter, air filter, clean twice the injectors, oil filter and oil. Now he said...

the cat converter has probably failed.get a new mechanic. also call the california bureu of automotive repair and report him for the repairs that did not fix your car. they will MAKE him pay you back

Jun 30, 2010 | 1993 Jeep Grand Cherokee

1 Answer

U-joints NYS Inspection

Yes it matters to the inspector, if it's standers part or after market part that was added and not functioning. They can fail it, I had Off road light's on my truck and one did not work but it was illegal to use them on the road i still failed my inspection till i replaced the bulb.
I ended removing the light, didn't feel like driving off to replace the bulb and come back to get it inspected again.
Good luck and hope this helps, guess it depends on how strick the inspector is.

May 27, 2009 | 2000 Jeep Wrangler

1 Answer

Failed Smog: Have VIR report, 95 Jeep Grand Cherokee

You could install a new catalytic converter and oxygen sensor for under $200 instead of paying someone to tell you the same thing. If you go that route, you can get cheap parts at or just plain old Autozone. You just have to cut the old cat off and clamp a new one on. I did mine in about an hour. The O2 sensor is easy too. On a side note, make sure your car is drive at highway speed for around 20 minutes to ensure the cat is hot enough to properly work.

Dec 10, 2008 | 1995 Jeep Grand Cherokee

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Catalytic converter question 94 Jeep 4.0

Most likely yes, why remove it, it only pulls about 1-2 HP at wide open throttle.

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