Cant seem to find many post dealing with code Po420 or about the catalytic converter. Any help would be appreciated. Ok so i took the car to the mechanic with the po420 code he said the car was still driveable but for smog check it would not pass. A new cat was the assesment after a a quick check. Im tired of poring tons of money in to this car (so far $10,000). Is there an easy bolt on cat. I live in the restrictive, tree hugging state of california. An will I cause any damage to the car if i continue to drive it unfixed. Also any suggestions, links, diagramps, how tos on replacing cat.

 

there is nothing really hard.. just one bolt that hard to get into...
here is a DI for the turbo install as well as CATS
http://www.a4mods.com/index.php?page...tml&category=1

 

Man a new engine and 2 turbos later.

 

Where can i find california friendly cats.

 

erase the code and see if it comes back... maybe there is nothing wrong...
any OEM cat is calfornia state friendly.
you can buy a highlow cat... u shouldnt have any check engine lights on, but not sure about the sniffer test though.

 

yEAH i TOOK it to the mechanic and he cleared it. It came back within 1 day. Is still a solid cel. Like I said the mechanic said it wouldnt cause damage to the engine but im not sure.What are your ideas on a code like that. Car runs fine bye the way.