Acura MDX SUV Forums banner

1 - 10 of 10 Posts

·
Registered
Joined
·
7 Posts
Discussion Starter #1
I have a 2005 with 132,000 miles. Check engine light came on, checked it out and code says front catalytic converter. I've tried resetting it a few times, but always comes back on.
I need to get it done to pass NJ inspection.
Dealer wants $1050. I can get one at a chain shock store like Monre or even Pep Boys for about $800. My question, is there anything special or difficult about getting this done that would be better to use the dealer for? Or would a discount chain store be okay? Open to any other ideas or suggestions.
Thanks
 

·
Registered
Joined
·
172 Posts
If u trust Ur discount chain, that's fine. If u do it yourself, it gets cheaper, can get the cat for under $200 from Rockauto... be sure it's not just the down stream o2 sensor failing instead of the cat...Fear not the DIY. Bratcop

Sent from my XT1585 using Tapatalk
 

·
Registered
Joined
·
1,179 Posts
I had same code (P0430) presented yesterday on my son's 03 MDX. I reset but car hasn't been driven. I see a new cat in my future, so I checked youtube. I found one good video w/ "Honda pilot catalytic converter" search.

It looks to be fairly straightforward, from top-side repair. Condenser fan shroud must be removed. If you live in northern climate, you could have rust/corrosion issues on nuts/studs. I can tell from e experience that removal of AF sensor is tricky. Difficult to disconnect electrical connector or bracket supporting connector.

I noticed that Odyssey w/ similar engine does not have the WU cats but only a single cat in combined exhaust stream. MDX has both WU cats and combined stream cat.

I looked at cats online and was leaning towards Walker, but I would be interested to hear what you use. Some have own heat shield and others allow OEM heat shields to be reinstalled.

good luck
 

·
Registered
Joined
·
44 Posts
I had cat not ready code on my 99 BMW 328I recently and my mechanic suggested we change the downstream oxygen sensors since they were out and they make the cat not ready. we did that, and cleared all the codes and then we had to go thru a "drive cycle" for BMW's that would lead to all components to be ready. It worked for my smog test for California. I suggest that before you go an change the Cat talk to an Indie Honda specialist to get a second opinion.
 

·
Registered
Joined
·
44 Posts
What scanner are using to read the codes? I was looking at some reviews and some of the ones with an App seem to suggest that they caused problems with the car running rough, etc. I need to buy one for my MDX.
 

·
Registered
Joined
·
7 Posts
Discussion Starter #6
I've had the code read at the dealer and two different friends have a scanners (one is a bmw tech.) and got the same code. I asked the dealer if it could be the 02 sensors and he said that would be a different code. But I think I'll check with a independent Honda shop too.
 

·
Registered
Joined
·
962 Posts
I am a retired Honda/Acura tech. Based on my experience:

P0420/430 codes are always catalyst failures, not O2 sensor problems. It also makes sense based on your mileage.

I tried various aftermarket cats to save my customers money, and ended up having to switch over to Factory units within 6 months or less. Buy a Genuine Acura cat from one of the mail order dealers at a discount.

If all you want to do is get through an emissions test, there are additives that you can add to your gas that will boost the efficiency of the cat for a hundred miles or so.

Link:https://www.walmart.com/ip/CRC-Guaranteed-to-Pass-Test-Formula-12-fl-oz/19853345

Video Link: https://youtu.be/EKpO6DCbEWk


If you do use the GTP product do this also:

Make an emissions test appointment calculated to be on the day after you will have finished the first full tankful of fuel mixed with the GTP.

For the second tankful, fill the MDX ONLY HALF FULL of gasoline - not full, as the video suggests. Have the codes erased.

Let the MDX sit overnight the day before the test. The morning of the test, start the MDX and let it idle for 3 to 5 minutes without moving the car. This allows the evap. emissions test to run properly.

On your way to the test, drive a steady 45 to 60 MPH for 5 minutes. This allows the catalyst tests to run.

You can now check for "Readiness" by using a scan tool or following the directions in your owners manual.
 

·
Registered
Joined
·
44 Posts
Thanks Bluepill. Can you recommend a scan tool that I can purchase at an Auto parts store that will not damage my Acura's computer that manages engine, emissions, and etc.?
 

·
Registered
Joined
·
1 Posts
I am a retired Honda/Acura tech. Based on my experience:

P0420/430 codes are always catalyst failures, not O2 sensor problems. It also makes sense based on your mileage.

I tried various aftermarket cats to save my customers money, and ended up having to switch over to Factory units within 6 months or less. Buy a Genuine Acura cat from one of the mail order dealers at a discount.

If all you want to do is get through an emissions test, there are additives that you can add to your gas that will boost the efficiency of the cat for a hundred miles or so.


If you do use the GTP product do this also:

Make an emissions test appointment calculated to be on the day after you will have finished the first full tankful of fuel mixed with the GTP.

For the second tankful, fill the MDX ONLY HALF FULL of gasoline - not full, as the video suggests. Have the codes erased.

Let the MDX sit overnight the day before the test. The morning of the test, start the MDX and let it idle for 3 to 5 minutes without moving the car. This allows the evap. emissions test to run properly.

On your way to the test, drive a steady 45 to 60 MPH for 5 minutes. This allows the catalyst tests to run.

You can now check for "Readiness" by using a scan tool or following the directions in your owners manual.
Genius. Thanks for posting all of this!
 

·
Registered
Joined
·
962 Posts
I use an OTC Professional scanner. Amazon looks like a good source for basic scanners, many well-reviewed and under $40. I suggest you read the reviews on their best sellers. You really only need the basic read and reset features.

Good luck.
 
1 - 10 of 10 Posts
Top