Code P0420 catalytic converter

unffortunetly* i think it was rattling when i was hitting the cat with my hand. and as far as the numbers of the o2 sensors they were changing slowly but reading the same number or at least really close to the same numbers

 

if it were mine i think i would replace the cat.but that's just what i would do.if you want to be sure take it to the shop.but like i said before i never replaced an o2 sensor with that code.

 

Even though i had it replaced a little over a year ago

 

if you do get a new cat make sure you get the old one back.depending on scrap prices you can get up to $30.00 back.just alittle bit to take some of the sting off of having to replace it again

 

My numbers were moving very slowly and not jumping around very much in Open Loop all day today. Going to replace sensors and see what happens.

My Cat isnt getting overly (glowing) hot and exhaust isnt at an above normal temp plus no rattling in the cat so Im going to see what an O2 sensor change does. Worst case I have an extra stock cat ill throw on and see what happens.

Will keep you updated after I do it.

 

No sulfur but my exhaust smells kind of rich.

 

cool thanks

 

Went to swap out the O2 sensor yesterday but the nuts on it were not budging and seem to have been eaten away by rust and such. going to have to put on a new flange I think. Will be trying the Vise grips after a few days of Penetrating oil. Well see what happens.

 

Haha, I got pulled over a few months ago by TX ST Pooper for not having a front license plate. He walked up to my pass side window asks for insurance and license as soon as he gets to the rear wheel, he turns around and asks me to step out of my vehicle, he said he got a Strong whiff of Marijuana. After playing the 20 questions game i.e. do you smoke, does anyone in your fam smoke, have you ever done drugs, etc etc he ran my license, went through my whole truck, looked under, sniffed around. He gave me a warning, and let me on my way. I never knew what he was talking about, but after a while, i do seem to get the smell of exhaust fumes inside my cab if i idle too long. I don't like it, but i have no money to fix it if i knew what it was. So my truck smokes pot, but not me

 

Get your truck up to operating temp and then spray some PB'laster. That should help

 

I replaced my cat with a toyota one and the code still came back. I am just going to drive it.