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Discussion Starter #1
Hello. 2006, 4.7, V8 with about 108,000 miles on it.

About 5 or 6 weeks ago my check engine light came on. Did the little key trick to pull the code which came up as P0430. Apparently this indicates an issue with emissions, catalytic converter, an exhaust leak, or the sensors on the cat.

So, the first time the light came on, I disconnected the battery for a half hour, reconnected and the engine light went away for about a week. Figured it might have been a fluke incident...

Well, the light has come back on about 4 times since then. Each time I reset it but it comes back on within 4 or 5 days or so. I have been hoping that if I ignore it, it might just go away!!! No luck. It just keeps coming back.

So, the jeep dealer service guy basically told me I could give them $100 and they would diagnose the issue. Oh boy!!!! As excited as I am to give them money to "look" at my jeep, I have been holding off...

I have a small shop down the street that specializes in exhaust systems (they do after market exhausts among other things...) They basically assume That I need to replace the whole cat. $1200 bucks.

So thats my story. Everything is fine with the jeep in terms of functionality. Its just the light that keeps coming on.

I was really just hoping to get some advice from anyone with any experience with this code. Anyone deal with this code in the past? Could it be something besides the cat? Would it be worth having the sensors replaced to see if that fixes the issue?

Anyone with experience with this code, please chime in!!! Thanks in advance.
 

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http://www.jeepcommander.com/forums/showthread.php?t=9101&highlight=P0430&page=2

http://www.jeepcommander.com/forums/showthread.php?t=17109&highlight=P0430

http://www.obd-codes.com/p0430

P0430 OBD-II Trouble Code

Technical Description
Catalyst System Efficiency Below Threshold (Bank 2)

What does that mean?
Basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.

Symptoms
You will likely not notice any drivability problems, although there may be symptoms such as a rough/hard idle when cold.

Causes
A code P0430 may mean that one or more of the following has happened:
The catalytic converter is no longer functioning properly
An oxygen sensor is not reading (functioning) properly
There is an exhaust leak

Possible Solutions
First, inspect for exhaust leaks.
Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen O2 sensor while you're at it.
One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.
 

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Discussion Starter #3
Thanks but I already looked through those threads and didnt really find anything helpful...

Anyone ever actually deal with this code/ issue?
 

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Really ? You didn't find anything helpful in any of those threads or the info that I posted below ? Unbelievable.
 

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Really ? You didn't find anything helpful in any of those threads or the info that I posted below ? Unbelievable.
Correct. The only solution in the thread discussions seems to be to get a new catalytic converter put in for upward of $1500 bucks. I feel very strongly that there might be other options when this particular code comes up. Using that logic, I might as well go out and buy a new jeep every time a code pops up... I cant afford that.

I have done a bit of research to no avail, hence the reason I made this thread.

I am simply looking for anyone who has had this code come up or experience with it who may have found another solution without needing to drop more than a grand.

My jeep is functioning fine. Its not like its making any crazy noises or having any functionality issues at all. But I do want keep everything up to date and take care of the problem.

So, no. I have not found any helpful info yet.
 

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The only solution in the thread discussions seems to be to get a new catalytic converter put in for upward of $1500 bucks.
Then I think you need to read them again.
 

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Mine was throwing the same code. While at the dealer for another problem, the tech flashed my ECM based on a technical service bulletin concerning that code. It basically widens the acceptable limits of the fore and aft O2 sensors. It's been several months without reoccurring.
 

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Mine was throwing the same code. While at the dealer for another problem, the tech flashed my ECM based on a technical service bulletin concerning that code. It basically widens the acceptable limits of the fore and aft O2 sensors. It's been several months without reoccurring.
Hey, Thanks a lot! I will definitely look into that!

The thing is, I just had my computer flashed like a month ago for some sort of recall/ firmware update to the jeeps computer...

I can only assume that the update that they did would be the most up to date firmware which would leave me in the same boat...

Once again though, thanks. This could lead to something!
 

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Hey, Thanks a lot! I will definitely look into that!

The thing is, I just had my computer flashed like a month ago for some sort of recall/ firmware update to the jeeps computer...

I can only assume that the update that they did would be the most up to date firmware which would leave me in the same boat...

Once again though, thanks. This could lead to something!
That info about the TSB is in one of the threads I gave you that you said you read but couldn't find anything helpful. There are other things to check out also besides bad cats if you just take the time to read what I gave you. Post #10 here---> http://www.jeepcommander.com/forums/showthread.php?t=9101&highlight=P0430
 

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Discussion Starter #11
That info about the TSB is in one of the threads I gave you that you said you read but couldn't find anything helpful. There are other things to check out also besides bad cats if you just take the time to read what I gave you. Post #10 here---> http://www.jeepcommander.com/forums/showthread.php?t=9101&highlight=P0430
Thanks for the replies and all, but that post #10 you are referring to is not really applicable for me. That TSB is for 2007 - 2008. I have a 2006 that was recently flashed with an update anyways.

I am really just hoping that I can get this resolved with another update of some sort, maybe my most recent one was done improperly? Or maybe I can just have the sensors replaced. Maybe thats the issue? I would think that would be much much cheaper than doing the whole cat.

Just hoping to bump into someone on here who has gone through similar issues and compare symptoms to narrow down and pinpoint the specific problem without dealing with the dealership... I hate those guys. Overpriced and over-rated.

Thanks for all the replies though.
 

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Replace the downsteam O2 sensor on that side. It is a ~$40 part and easy to do. It is as 99% likely to be the cause of the problem as these things fail all the time. They only last about 50k on average. If you have not done any crazy modification to the engine to make it run rich or produce considerably more power, the cat should be fine.

If by rare chance you do need a cat, have a muffler shop put one on and your cost will probably go down to $200 or so , installed.
 

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Replace the downsteam O2 sensor on that side. It is a ~$40 part and easy to do. It is as 99% likely to be the cause of the problem as these things fail all the time. They only last about 50k on average. If you have not done any crazy modification to the engine to make it run rich or produce considerably more power, the cat should be fine.

If by rare chance you do need a cat, have a muffler shop put one on and your cost will probably go down to $200 or so , installed.
Hey man. Thanks for the advice! Its the kind of thing I "want" to hear right now. Sounds logical too. I am not the type of guy to listen to any mechanic or service dept when they say "looks like you need a new cat and it will cost you upward of $1500". Not the first time around anyway. So I really appreciate the insight. Exactly what I was looking for. Lets just hope it resolves the issue!

So, as you might have guessed, I am not a mechanic. How tough would it be to install the sensor myself with basic tools? I would think it would be tough to get at. Any tips?
 

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Hey man. Thanks for the advice! Its the kind of thing I "want" to hear right now. Sounds logical too. I am not the type of guy to listen to any mechanic or service dept when they say "looks like you need a new cat and it will cost you upward of $1500". Not the first time around anyway. So I really appreciate the insight. Exactly what I was looking for. Lets just hope it resolves the issue!

So, as you might have guessed, I am not a mechanic. How tough would it be to install the sensor myself with basic tools? I would think it would be tough to get at. Any tips?
That info is also in the threads I gave you to read and in the info I posted below. But apparently you don't want to listen to anything I have to say.
 

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Discussion Starter #15
So its been about 6 days since I last reset the batery and the light has not come on again. I have not done anything to fix the issue yet by the way.

Quick question though. If the cat is bad, are there any symptoms, functionality-wise that would lead me to belive that there is actually something wrong with it? I would still like to believe that its just a bad sensor...
 

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Hey man. Thanks for the advice! Its the kind of thing I "want" to hear right now. Sounds logical too. I am not the type of guy to listen to any mechanic or service dept when they say "looks like you need a new cat and it will cost you upward of $1500". Not the first time around anyway. So I really appreciate the insight. Exactly what I was looking for. Lets just hope it resolves the issue!

So, as you might have guessed, I am not a mechanic. How tough would it be to install the sensor myself with basic tools? I would think it would be tough to get at. Any tips?
The O2 sensor threads into the the exhaust with a wrench and has a plug with a safety clip for the electrical. If you can get both hands, and or tools on the plug to get it apart, you are set. threading in the new O2 and plugging it back together is the easy part.

Bad cats tend to result in reduced power, especially at high RPMs, but I doubt this is your issue.
 

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Same issue on way back from texas to nc thought my transmission was going out slipping ect ect rpm would drop but car would rev heat gauge speed gauge and tac would bounce or flutter cut cats off all off all problems stopped instantly
 
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