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Old 01-19-2014, 07:59 AM   #1
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Catalytic convertor

Hello everyone,

This is my first post, I love WF, being new to jeeping I get a lot of helpful information here, hoping the trend continues!!

I bought my first wrangler 4 months ago, finally!! This an 05 TJ Unlimited, 100K. Here is the deal, check engine light has been on since a week after I bought it. I replaced an O2 sensor, but the light came back on. Brought it to the dealership, I'm no gear head, they said I need new cats ($1200). My question is do I need to replace them or just get used to looking at that light?

Any other ideas??

Thanks in advance!

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Old 01-19-2014, 09:00 AM   #2
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You won't pass emissions with cel on

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Old 01-19-2014, 09:01 AM   #3
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Quote:
Originally Posted by Diverdink View Post
Hello everyone,

This is my first post, I love WF, being new to jeeping I get a lot of helpful information here, hoping the trend continues!!

I bought my first wrangler 4 months ago, finally!! This an 05 TJ Unlimited, 100K. Here is the deal, check engine light has been on since a week after I bought it. I replaced an O2 sensor, but the light came back on. Brought it to the dealership, I'm no gear head, they said I need new cats ($1200). My question is do I need to replace them or just get used to looking at that light?

Any other ideas??

Thanks in advance!
You will not be able to pass emission testing with a check engine light. $1200 seems a bit pricy. I would take it to a local muffler shop and have them put the cat(s) in. Buy them yourself off the internets and save a few more $$.
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Old 01-19-2014, 09:14 AM   #4
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Thanks for the info, but we don't have emission checks in my area.
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Old 01-19-2014, 09:24 AM   #5
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A bad cat can also rob power and can also cause other issues if it stops up
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Old 01-19-2014, 09:36 AM   #6
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What if you remove it?
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Old 01-19-2014, 10:18 AM   #7
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What if you remove it?
Technically that's illegal. Removing any smog or emissions equipment is against federal law and most of that is looked down upon on this forum. If someone were to remove the cat and had no emissions testing in their area the only ill effect would be the legality. Thats about as clear as I should make it without moderator intervention. Good luck.
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Old 01-19-2014, 10:30 AM   #8
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Some non emission tested guys would just brake the honeycomb brick out of the inside of the cat making system cat free but still appeared unchanged from outside

They also used to sell bolt on straight pipe sections that replaced cat and were sold as "test pipes" but I have not seen any for a few years
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Old 01-19-2014, 11:31 AM   #9
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I replaced the cats on my 2006 lj with complete system from bosal. It was a complete bolt in installation for around 300$ from rock auto. One of my precats was completely empty and it had clogged the third cat. The install took about 2 hours and I completed it in my driveway.
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Old 01-19-2014, 11:35 AM   #10
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no harm intended digger but before i would break the honey comb out i would remove whole conv. and sell for top dollar at the local salvage yard. some cats bring big money. like i said at beginning not trying to argue just trying to help recoup a few dollars
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Old 01-19-2014, 12:59 PM   #11
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Looking at prices on cats they are all over the board, going anywhere from 200 to 900, what gives? Is there something the 900 ones do that the 200 don't?
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Old 01-19-2014, 01:23 PM   #12
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The 900 ones are usually california legal. The 200 ones are only 49 state legal. California has stricter emission standards then other states so there are more precious metals in the cats then the 49 state counterparts.
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Old 01-19-2014, 02:28 PM   #13
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The 900 ones are usually california legal. The 200 ones are only 49 state legal. California has stricter emission standards then other states so there are more precious metals in the cats then the 49 state counterparts.
This or you are looking at " bolt on" which are a direct fit or universal, of which flanges may have to be welded on. This can affect price greatly.
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Old 01-19-2014, 03:33 PM   #14
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STOP DO NOT buy a cat!!! Check this out first.

I own a 05 Unlimited also that has the same problem. Sept 30, 2013 Chrysler sent out a letter stating, "This letter is to inform you that the warranty period (3 years or 36,000 miles) on your Wrangler's Onboard Diagnostic (OBD) monitor has been extended to lifetime coverage. This extended readiness monitor warranty coverage applies to select model year 2005 - 2006 Wranglers."

Contact Chrysler Customer Assistance Center Mon. thru Fri 7 AM to midnight EST or Sat 8 AM to 8 PM or SUN 9 AM to 5 PM at 1-877-426-5337 to see if your LJ is among those involved. Have your 17 Digit Identification number (VIN) ready to give them and they can check to see if yours is included in this group.
This letter is about the (readiness status of "Not Ready".)

It appears to me that there may be a problem with the OBM and it may be more than what Chrysler wants to admit to like the "DEATH WOBBLE" issue.

Get a code reader that will reset the codes and you will most likely find that you may go days, weeks, or months between times you get the 02 code like mine dose.
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Old 01-19-2014, 04:47 PM   #15
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Quote:
Originally Posted by sinepome View Post
Technically that's illegal. Removing any smog or emissions equipment is against federal law and most of that is looked down upon on this forum. If someone were to remove the cat and had no emissions testing in their area the only ill effect would be the legality. Thats about as clear as I should make it without moderator intervention. Good luck.
The other ill effect is the air your children will breathe. Think of someone other than yourself.
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Old 01-31-2014, 08:48 AM   #16
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FWIW, I took my '06 Unlimited in for inspection in the beginning of december. I was constantly getting a check engine light and had replaced what I thought was the offending sensor. Even though the CEL was not lit, it failed "readiness" with two things failed "ready". It's only allowed to fail one. Took it to the dealer, they said I needed new cats at a cost of $1200. I ordered an Eastern Catalytic exhaust for less than $300 from Rock Auto. Installed no problem, great fit. Indeed, the rear mini-cat was clogged.

Jeep runs 100X better but I've now driven it over 600 miles and it still hasn't performed the OBD test so I can take it in for inspection. The way you can tell is to turn the ignition on w/out starting. If the check engine light remains lit after 15 seconds or so, all is good and it's "ready". If it starts blinking after 15 seconds, it is NOT ready and will fail inspection. I am going to give it another 100 miles or so and if it's still not ready, it goes to the dealer for the OBD warranty issue to be performed. By the way, the big cat in the back is NOT monitored. My rear kitty has been killed.
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Old 02-01-2014, 11:30 AM   #17
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I just performed the above mentioned TSB this morning. If you're at all comfortable soldering a couple of wires and using some heat shrink, this is no problem for you. It took me all of 45 minutes and was VERY simple!

Here are the instructions straight from Jeep:

http://www.obdclearinghouse.com/docu.../25-001-07.pdf

Hopefully the OBD will show "ready" within 100 miles or so. I'll report back.
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Old 02-04-2014, 11:00 AM   #18
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Reporting back with good news. The OBD is ready for inspection after 80 miles. Thank you once again, internet! Jeep dealer can kiss my pasty, white A$$!!!!!

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