2004 SR5 V6 Catalytic Converters

When did you change out your catalytic converters?

I got a 0420 code at 191k so bank 1. best suggestion for this issue anyone?

 

I'd start with seeing if replacing just the O2 sensor resolves the problem before spending the $$ on a replacement manifold cat.

 

DENSO part #2344804 for the O2 sensor - $51.79 on RockAuto - https://www.rockauto.com/en/moreinfo.php?pk=1607468&cc=1428881&pt=5132&jsn=856

The cat will run you anywhere from $170 to $500 for the cat itself, depending on the brand you go with and then add labor to get it installed, unless you do it yourself.

https://www.rockauto.com/en/catalog...1,exhaust+&+emission,catalytic+converter,5808

 

i got a new gas cap and it turned off my CEL and I passed my smog test today so maybe it was my gas cap...

 

Glad that worked for you. When I was recently dealing with a P0420 on my V8, replacing the O2 sensor took care of it initially but then it started coming back. I did some exhaust work and found the gaskets from the cat to the y-pipe were completely shot. Since replacing those, no more P0420. So it can be difficult to tell where the actual issue lies sometimes with these codes.

 

i found these posters, maybe it can help someone!