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shultzee13 · 09-07-2017, 03:00 PM

The cat on bank 1 is rattling bad - the honeycomb is for sure broke apart but I am not getting a code P0420.
I am getting a code P0430 for bank 2. That cat is not rattling.

I am confused.

If the cat on bank 1 is rattling, wouldn't I get a code or am I not getting the code because the honeycomb is busted and it can breath?

Is there anything else that could be causing P0430 on bank 2 besides the Cat?

Both cats were replaced about 2 yrs ago. I could never beat the codes from coming back so I put in the defoulers. Someone said the defoulers can cause issues with running rich though.

I am just not sure what to do and I am tired of throwing money at it.

09-07-2017, 03:00 PM	#1
shultzee13 Registered User Join Date: Jan 2012 Location: Tyler Texas Posts: 223	Catalytic Converter Issues on 98 5.7L 2wd Suburban The cat on bank 1 is rattling bad - the honeycomb is for sure broke apart but I am not getting a code P0420. I am getting a code P0430 for bank 2. That cat is not rattling. I am confused. If the cat on bank 1 is rattling, wouldn't I get a code or am I not getting the code because the honeycomb is busted and it can breath? Is there anything else that could be causing P0430 on bank 2 besides the Cat? Both cats were replaced about 2 yrs ago. I could never beat the codes from coming back so I put in the defoulers. Someone said the defoulers can cause issues with running rich though. I am just not sure what to do and I am tired of throwing money at it.