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.