2019 tahoe catalytic converter

[youredoingitpeter]

Lately I've been throwing the codes p0420 and p0430 for bank 1 and bank 2 running below efficiency. I have cleared them a few times.
So first, I'm in California.
I have found online, some CARB cats like magnaflow. There are an enormous amount of other types like EPA compliant.
Is there a difference between EPA and CARB?
I'm able to get an EPA shipped to my in laws in AZ if putting it on is an option.
Are there markings on a cat to let a shop know that it's an EPA, universal, or CARB?
I'm not trying to buy something just to get turned down from a muffler shop cuz California laws are ridiculous.
Any input is appreciated.

 

[Doubeleive]

Lately I've been throwing the codes p0420 and p0430 for bank 1 and bank 2 running below efficiency. I have cleared them a few times.
So first, I'm in California.
I have found online, some CARB cats like magnaflow. There are an enormous amount of other types like EPA compliant.
Is there a difference between EPA and CARB?
I'm able to get an EPA shipped to my in laws in AZ if putting it on is an option.
Are there markings on a cat to let a shop know that it's an EPA, universal, or CARB?
I'm not trying to buy something just to get turned down from a muffler shop cuz California laws are ridiculous.
Any input is appreciated.

carb cat's have numbers stamped on them to show they are approved if you put a epa cat on then it will have the wrong numbers and you will not be able to pass smog.
that being said a 2019 "might" be under warranty, check with the dealer first.
also a factory y pipe might be a better option as well, depends on prices

 

[15burban]

The emission systems should have a longer warranty so I'd check into that like @Doubeleive said.

How many miles are on the rig? If high miles possibly 02 sensors are getting lazy.

 

[youredoingitpeter]

The emission systems should have a longer warranty so I'd check into that like @Doubeleive said.

How many miles are on the rig? If high miles possibly 02 sensors are getting lazy.

I'm at 115459. O2 sensors have all been changed about 3 months ago. Maybe 4.

 

[youredoingitpeter]

carb cat's have numbers stamped on them to show they are approved if you put a epa cat on then it will have the wrong numbers and you will not be able to pass smog.
that being said a 2019 "might" be under warranty, check with the dealer first.
also a factory y pipe might be a better option as well, depends on prices

I'm calling dealership today. I've seen a factory y pipe online for $1800. That's kinda steep

 

[15burban]

You could possibly try something like cataclean.

Sorry I'm not familiar with California laws but are you allowed to buy a carb compliant cat and have a shop weld it in? I did that on my pontiac roughly 10 years ago with a magnaflow when the oem clogged up.

 

[Doubeleive]

I'm calling dealership today. I've seen a factory y pipe online for $1800. That's kinda steep

the catco's are typically around $650 each installed (depending on the muffler shop) so $1800 isn't that much more of a stretch for something that can just be bolted on.
the newer catco for the k2's might even be slightly more. I would call around any muffler local muffler shops and get prices.
the dealer will not install a aftermarket cat.

 

[youredoingitpeter]

You could possibly try something like cataclean.

Sorry I'm not familiar with California laws but are you allowed to buy a carb compliant cat and have a shop weld it in? I did that on my pontiac roughly 10 years ago with a magnaflow when the oem clogged up.

I'll look into a cleaner.
I think buying a compliant cat and having a ship install it is ok.

 

[Doubeleive]

You could possibly try something like cataclean.

Sorry I'm not familiar with California laws but are you allowed to buy a carb compliant cat and have a shop weld it in? I did that on my pontiac roughly 10 years ago with a magnaflow when the oem clogged up.

cataclean won't work, your better off unbolting it and throwing it in a giant bucket of vinegar, let it soak and wash it out, that might work maybe.....or it will ruin it
the little tiny holes get clogged up

 

[youredoingitpeter]

the catco's are typically around $650 each installed (depending on the muffler shop) so $1800 isn't that much more of a stretch for something that can just be bolted on.
the newer catco for the k2's might even be slightly more. I would call around any muffler local muffler shops and get prices.
the dealer will not install a aftermarket cat.

Local shops are open on Monday. So I'll call and find out about their pricing.
I didn't specify, but I'm calling the dealership to check on warranty. I typically stay away from dealerships due to being overpriced.

 

[Doubeleive]

i've been thru the wringer with cat's. aftermarkets last me about a year, slightly longer if im lucky, but i'm not a normal driver

 

[youredoingitpeter]

cataclean won't work, your better off unbolting it and throwing it in a giant bucket of vinegar, let it soak and wash it out, that might work maybe.....or it will ruin it
the little tiny holes get clogged

How would I do a one piece y pipe with the 2 cats? Just dump it down the pipe and let it soak?

i've been thru the wringer with cat's. aftermarkets last me about a year, slightly longer if im lucky, but i'm not a normal driver

Which ones have you been using?

 

[Doubeleive]

How would I do a one piece y pipe with the 2 cats? Just dump it down the pipe and let it soak?

Which ones have you been using?

it's really nothing to do with the brand, i have catco's on it now, I had used the magnaflow's before but since covid came along the price doubled from $650 to $1200 (or more)
the magnaflows might have lasted a little longer but not for double the price now.
part of all the cat pricing has to do with with manufacture price fixing, they essentially "force" all licensed cat "dealers" to set a minimum price or they get blacklisted and cannot sell there cat's. technically that is illegal but combating it takes a class action lawsuit and lots of money. so it kind of just fly's under the radar.
that's why if you search for a carb cat online all the prices are the same for the model searched, no matter who is selling it.
with the exception of a local auto parts like advanced auto, autozone, etc they will have full retail prices (crazy)
magnaflow is there own brand, eastern/catco are both made by eastern, walker is tenneco.
anywhere you look your basically screwed price wise.
a factory cat (y-pipe) price can vary, some of the big online dealers may have the best deal. but they can turn around and get you on shipping, whereas a local dealer may have the option of getting it in with there regular orders and not hitting you with a additional cost.

 

[Doubeleive]

How would I do a one piece y pipe with the 2 cats? Just dump it down the pipe and let it soak?

Which ones have you been using?

I have never tried flushing one I have seen youtube videos of it being done, but ya the easiest would probably be too cap off one end and fill it up and let it soak and then flush it out.