P0153 P0430 Assistance please - Jeep Commander Forums: Jeep Commander Forum
 
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post #1 of 9 (permalink) Old 12-14-2011, 08:39 AM Thread Starter
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Thumbs up P0153 P0430 Assistance please ***REPAIRED - SEE LAST POST***

Hello all,

I have an 08 Commander 5.7L with a P0153 and occasional P0430 code.



One code or both codes will come on after about 30 minutes of driving.

Milage is 97000, outside of any warranty.

I replaced Bank 2 Sensor 1 O2 Sensor - Code returned.

Dealer replaced Bank 2 Sensor 1 O2 Sensor. Said mine was bad. NAPA gladly took it back. Code returned.

Dealer reprogrammed PCM as per TSB for P0153 code. Code Returned.

Dealer could not find an exhaust leaks aurally. Dealer traced wires from B2S1 to the PCM without any broken or frayed wires.

Dealer recommended replacing catalytic converter.

Took it to a local muffler shop, guy said that cat is unlikely but he would do it if I wanted him to. OEM Part about $1200 Both cats and pipes to the Y section . Not sure about the aftermarket options, would be willing to go that route if it would fix the DTC.

Any assistance would be appreciated.

Code information for reference:
-----------------------------------------------------
P0153

Technical DescriptionOxygen Sensor Circuit Slow Response (Bank2, Sensor1)

What does that mean?This involves the oxygen sensor upstream the catalytic converter on Bank 2. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.

SymptomsYou will likely not notice any drivability problems, although there may be symptoms.

Causes

A code P0153 may mean that one or more of the following has happened:

The oxygen sensor is faulty
The wiring to the sensor is broken / frayed
There is an exhaust leak
Possible SolutionsThings that may fix the problem include:

Check and fix any exhaust leaks
Check for wiring problems (shorted, frayed wires)
Check the frequency and amplitude of the oxygen sensor (advanced)
Check for a deteriorating / contaminated oxygen sensor, replace if necessary
Check for inlet air leaks
Check the MAF sensor for proper operation
Replace the Bank 2 oxygen sensor upstream of the catalytic converter
--------------------------------------------------------------------
P0430
Technical DescriptionCatalyst 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.

SymptomsYou 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 SolutionsFirst, 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.
-------------------------------------------------------------

Images below are for the two sets of O2 voltages as just run on OBDwiz Bank 1 is not failing only Bank 2.
Attached Thumbnails
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Name:	O2 Voltage B2S1.JPG
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Last edited by rojawajr; 05-04-2012 at 11:52 AM.
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post #2 of 9 (permalink) Old 12-18-2011, 08:52 AM Thread Starter
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Anyone with any advice? Mostly just looking to see if anyone thinks the cats could be bad and due to the cost of OEM whether on not any aftermarket cat systems can be used to get rid of the MIL light.
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post #3 of 9 (permalink) Old 12-18-2011, 04:44 PM
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As indicated, it looks like bank 2 is a dead cat.
As you can see on the bank 1 side there is a dramatic difference between primary and secondary 02's, like it is supposed to be.
This proves the exaust going into the cat has been through conversion.

The bank 2 side shows very little conversion, hence the similar voltage readings between primary and secondary 02's......IE, dead catalyst.

Darn shame though, the cats used to be a 10/100k warranty.....now I think they are 7/70k.

If you can get a aftermarket that fits correctly, there is no reason not to use it.....they have to meet the same performance criteria as the original equipment.

And, most likely, this is responsible for both the codes.

Good luck,
Rob


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post #4 of 9 (permalink) Old 12-18-2011, 04:58 PM Thread Starter
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Thanks Robby,

As for the aftermarket, Do I just have a muffler shop cut the new one in between the old O2 sensors? I was under the impression that O2 sensor distances from the cat was critical for correct sensor reading.

Or is there an aftermarket system that is closer to OEM? I looked briefly at Magnaflow and could not find a 2008 P/N. Any brands that members have used successfully please leave P/N and MFG.

Thanks all.
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post #5 of 9 (permalink) Old 12-18-2011, 06:08 PM
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I don't think any members have had a cat failure.......well, not a normal failure....I think a few got crushed off roading, soooo.

I was noseing around to see what is available.....Never realized the darn things are integral with the headpipe, hence the expense.
02 distance isn't that critical. It was some years back before the heated sensors came about.....all the new stuff is heated.
Look at Discount catalytic converters site...they have several 'cut and weld' replacements if your exaust shop is up to the task.
If they are, the weld ins seem to be in the 100.00 range or a bit less.

Do be certain your exaust folks have the capability to handle this though.....good welders are few and far between.

Rob


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post #6 of 9 (permalink) Old 12-18-2011, 10:54 PM Thread Starter
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Thanks for the info. Will let everyone know how it works out as soon as I knock out the repairs.
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post #7 of 9 (permalink) Old 05-04-2012, 11:50 AM Thread Starter
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Talking P0153 p0430 repaired!!!!

Just wanted to update everyone with the conclusion to my P0153/P0430 Code issue.

Ended up replacing the Catalytic Pipe Assy, and installing a new gasket on the right/passanger side exhaust manifold.

Catalytic was $1100 after taxes and shipping, OEM part from a MOPAR warehouse, and the gasket cost $16.00. Adding in the nuts and bolts, from the dealer no less, for another $30. and for under $1150 and about 5 hours worth of labor, I finally got rid of that pesky MIL light. I am going on two weeks so I am confident the work I did was the fix. I was able to remove the cat pipe with info from the Chilton's online manual, and was able to do the task at home with a couple of jackstands.

There was indeed a hole in the Cat pipe, after the bank 2 cat, but since the gasket was an easy replacement without the cat in the way, I went ahead and did that at the same time. Can't be certain which of the two parts was the culprit. All exhaust bolts came out easy, after soaking with PB blaster for 24 hours.

If anyone needs any additional info on how to do this repair feel free to PM me. I hope this helps anyone with a similar problem.

V/R

Ron
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post #8 of 9 (permalink) Old 06-10-2013, 12:09 PM
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I have the P0153 code coming up every 40km of driving which seems to trigger while driving with the Jeep warmed up at around 75km per hour. I have one dealership saying it's the exhaust manifold and gasket while my local mechanic doesn't see the signs of passing exhaust. How much work is it to change the exhaust manifold gasket?

Mike Harris
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Ontario, Canada

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post #9 of 9 (permalink) Old 06-03-2014, 09:54 PM Thread Starter
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Sorry haven't been around this site in a while. Are you still having the 0143 code. If you are, let me know and I will talk you through, how to fix it.

Ron
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  Jeep Commander Forums: Jeep Commander Forum > Jeep Commander Discussion > Regular Service / Maintenance > Diagnostic Trouble Codes (DTC)

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