Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class C Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 04-01-2021, 08:10 PM   #1
Junior Member
 
JoJoKnight's Avatar
 
Jayco Owners Club
Join Date: Nov 2018
Location: Idaho
Posts: 5
Catalytic Converter

2010 Greyhawk 31ss. Est 25,000 miles. Check engine light came on. Reads code P0420. Shop says they’ve tested everything and believes the CAT is shot. With 25,000 miles...REALLY! There are NO other typical symptoms of CAT failure. Just the code. Shop says the CAT has some rattling. Shop also told me I needed the DIFF oil changed. My trucker dad about lost his mind over that one too. Anybody else have CAT failure with such low miles? Estimating $1500 to replace.
JoJoKnight is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 04-01-2021, 10:56 PM   #2
Senior Member
 
avfordguy's Avatar
 
Monaco Owners Club
Ford Super Duty Owner
Join Date: Dec 2008
Location: Kingsville TX
Posts: 1,459
Check downstream o2 sensor and wiring.
avfordguy is offline   Reply With Quote
Old 04-01-2021, 10:58 PM   #3
Senior Member
 
avfordguy's Avatar
 
Monaco Owners Club
Ford Super Duty Owner
Join Date: Dec 2008
Location: Kingsville TX
Posts: 1,459
Make sure there are no other codes, if there is,address those first. Ford cats are pretty robust.
avfordguy is offline   Reply With Quote
Old 04-02-2021, 12:11 AM   #4
Junior Member
 
Join Date: Mar 2021
Posts: 22
If the actually does have rattle in it then they are likely correct. The question I have is, how did they determine the rattle? I'd want to hear the rattle myself before spending that kind of money. 2nd would be why did it go out. Are you burning oil? Do you ever see smoke at your exhaust?

Hard to believe the cat is bad at 25k. Check or replace o2 sensor. Also you may want to run a tank full of premium gas 1st. It has been known to help a cat clear up some.
Roland J is offline   Reply With Quote
Old 04-02-2021, 03:34 PM   #5
Senior Member
 
Bill Gail's Avatar
 
Join Date: Oct 2018
Location: The Great NorthWest
Posts: 508
Quote:
Originally Posted by JoJoKnight View Post
2010 Greyhawk 31ss. Est 25,000 miles. Check engine light came on. Reads code P0420. Shop says they’ve tested everything and believes the CAT is shot. With 25,000 miles...REALLY! There are NO other typical symptoms of CAT failure. Just the code. Shop says the CAT has some rattling. Shop also told me I needed the DIFF oil changed. My trucker dad about lost his mind over that one too. Anybody else have CAT failure with such low miles? Estimating $1500 to replace.

This whole thing raises a red flag .

The cost of the converter is more than their quote without labor added .

Federal law requires vehicle manufacturers to warranty Catalytic Converters for 15 years or 150,000 miles , whichever comes first. Your converter should be covered .

I would take it to the Engine/Chassis manufacturer truck repair shop. Since they are responsible for replacement , they'll test to check if the converter is the problem.
Bill Gail is offline   Reply With Quote
Old 04-02-2021, 04:34 PM   #6
Senior Member
 
gljurczyk's Avatar
 
Join Date: Mar 2016
Posts: 408
Catalytic Converter

Quote:
Originally Posted by JoJoKnight View Post
2010 Greyhawk 31ss. Est 25,000 miles. Check engine light came on. Reads code P0420. Shop says they’ve tested everything and believes the CAT is shot. With 25,000 miles...REALLY! There are NO other typical symptoms of CAT failure. Just the code. Shop says the CAT has some rattling. Shop also told me I needed the DIFF oil changed. My trucker dad about lost his mind over that one too. Anybody else have CAT failure with such low miles? Estimating $1500 to replace.

It’s still under warrenty, I don’t know if you have a Ford or Chevy or MBZ chassis, which ever one you have take it there. Also never heard of a diff oil change, run and run fast.
gljurczyk is offline   Reply With Quote
Old 04-03-2021, 02:56 AM   #7
Junior Member
 
Join Date: Mar 2021
Posts: 22
I believe the 15 year 150k mile warranty is only for California.

8 year 80k miles emissions parts warranty is the US Federal law. But It also has a bunch of potential loop holes. The price of cat depends which cat is bad and where you get the replacement from. Genuine ford look like it could be had for $950 for a front cat you can find some cheaper.

Differential oil change at 50,000 of heavy use miles is what manufacturers recommend. If yours shows signs of leaking it's not bad to do a change. Just because your rig is 10 years old is enough reason for some to want new differential fluid. I plain on doing mine this month as I just bought my MH and I like to know all my fluids are in good shape.
It's also not a bad idea to check the old dif gear oil for metal shaving if you plain on doing a lot of driving.
Roland J is offline   Reply With Quote
Old 04-03-2021, 06:21 AM   #8
Senior Member
 
Ron Dittmer's Avatar
 
Join Date: Jul 2018
Location: West Dundee, IL
Posts: 807
Quote:
Originally Posted by Roland J View Post
If the actually does have rattle in it then they are likely correct. The question I have is, how did they determine the rattle? I'd want to hear the rattle myself before spending that kind of money. 2nd would be why did it go out. Are you burning oil? Do you ever see smoke at your exhaust?

Hard to believe the cat is bad at 25k. Check or replace o2 sensor. Also you may want to run a tank full of premium gas 1st. It has been known to help a cat clear up some.
I agree with much of Roland J's statement.

It is very easy to check for a broken CAT. Crawl under your rig and hit the CAT with your fist. If it is cracked and broken inside, you will hear rattling inside. It should sound very solid.

It is also possible that the heat shield that wraps the CAT has come loose. Don't mistake a loose heat shield for broken internals.

One thing I disagree with Roland J about is the use of premium fuel. You want to use the lowest octane, especially if you want to clean your CAT. That would be 87 in most parts, 85 at high altitude regions. The lower the octane, the higher the exhaust temperature, the cleaner the burn. High octane fuels reduce pre-detonation making the fuel a tad less potent.
Ron Dittmer is offline   Reply With Quote
Old 04-03-2021, 11:02 AM   #9
Junior Member
 
Join Date: Mar 2021
Posts: 22
Quote:
Originally Posted by Ron Dittmer View Post
I agree with much of Roland J's statement.

It is very easy to check for a broken CAT. Crawl under your rig and hit the CAT with your fist. If it is cracked and broken inside, you will hear rattling inside. It should sound very solid.

It is also possible that the heat shield that wraps the CAT has come loose. Don't mistake a loose heat shield for broken internals.

One thing I disagree with Roland J about is the use of premium fuel. You want to use the lowest octane, especially if you want to clean your CAT. That would be 87 in most parts, 85 at high altitude regions. The lower the octane, the higher the exhaust temperature, the cleaner the burn. High octane fuels reduce pre-detonation making the fuel a tad less potent.
The theory behind running a single tank 20-30 gallons of higher octane gas is... The slower burning fuel (premium gas) is still burning (more thermal energy is being wasted and going out the exhaust) as the exhaust valves open. This should equal a hotter cat temp.

I have not personally confirmed the higher cat temp, other than it appears to consistently work on older Honda's that greatly suffer from cat issues due to the stupid cylinder management causing burning of oil.
Roland J is offline   Reply With Quote
Old 04-03-2021, 11:28 AM   #10
Senior Member
 
creativepart's Avatar
 
Winnebago Owners Club
Join Date: Sep 2009
Location: Spring Branch, TX
Posts: 1,963
In short... get a second opinion. From a very trusted shop.

There is a huge market for the metals inside your Cat Converter. Selling you a new one and then passing on your old still good one to a reseller would make any shop thousands of dollars.
__________________
2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad
creativepart is offline   Reply With Quote
Old 04-03-2021, 04:49 PM   #11
Senior Member
 
Ron Dittmer's Avatar
 
Join Date: Jul 2018
Location: West Dundee, IL
Posts: 807
I was surprised to learn that a bad CAT is worth multiple hundreds of dollars to a recycler. No wonder why bad people steal them.

Rock Auto sells them for the E450 as cheap as $440. You could easily recover $200 to $300 from the original one.
Ron Dittmer is offline   Reply With Quote
Old 04-18-2021, 03:12 PM   #12
Junior Member
 
JoJoKnight's Avatar
 
Jayco Owners Club
Join Date: Nov 2018
Location: Idaho
Posts: 5
THANKS

Thank you all for your input! It is much appreciated. I’m seriously considering a 2nd opinion. It’s great to have a place that we can pick the brains of others.
JoJoKnight is offline   Reply With Quote
Reply

Tags
cat, converter, jayco



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Banks causing damage to catalytic converter DKK47 Workhorse and Chevrolet Chassis Motorhome Forum 15 01-11-2016 03:11 PM
Where to get a catalytic converter hookonrv Ford Motorhome Chassis Forum 3 08-19-2007 04:44 AM
Catalytic Converter is here supercub Workhorse and Chevrolet Chassis Motorhome Forum 2 04-29-2006 05:52 PM
Catalytic Converter Recall?? supercub Workhorse and Chevrolet Chassis Motorhome Forum 2 04-26-2006 06:20 PM
Catalytic Converter Recall JudyandJim Workhorse and Chevrolet Chassis Motorhome Forum 4 03-14-2006 06:06 PM


All times are GMT -6. The time now is 02:07 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.