Help taking off po420 code

No, you can also get the URD simulators or HPTUNERS and turn of the cat monitors. I’d go with the latter as it also lets you custom tune the ECU. Did really help my throttle mapping and tied together odd engine mods

 

Not like there used to be... In MA, the inspection bays have cameras. And the inspector is also taking pics of the truck and plates. With that, inspections have become thorough.

Safety inspection every year. "Emissions," every other. No extra $, just another step in the process. Not that it really matters. They plug into the OBD port every time.

They're even going so far as to check that each seat belt works.

 

Yea here in south Texas they just want money

 

I can't, "Like," that. Greedy bastids. Coming from someone who lives in Taxachussettes.

If you're not worried about it, cool beans.

 

Eh, same deal whether Texas or Mass, they all just want money, Mass just works a LOT harder to earn it.

 

Replace the cats,its illegal to hollow them out.

 

URD O2 Sim? Might as well throw a supercharger on while you're at it.

#FSM I have bad cats so I added a supercharger

 

I have bad cats in my 07 Tacoma and I run those spark plug antifowlers mentioned before stacked 2 high to get my rear 02 sensors out of my exhaust stream. No cel for over 1000 miles. Does hollowing out your cats do anything for performance ?

 

It makes it like a free flow exhaust system.
For example: many race car mid pipes can be purchased without cats b/c it will flow better. Then the tuner will tune out the CEL and code so it's not an issue.
As far as performance, a clogged cat is an issue. A gutted cat isn't. But it's less environmentally friendly.

 

Apparently your 'hallowed' catylytic converters are the problem, apparently they have been consecrated but still have a few demons left in them

 

Yea I just ordered two for the front still looking for another the bottom two

 

You can get by without the downstream converters if your in a non emissions testing area as they are not monitored by the PCM so replacing the up-streams should get rid of your p0420/30 codes.

 

Not really but it probably feels good on a certain level.

 

good idea.

 

why?

 

Well since you gutted your cats, you have to kill the post-cat O2. That will trip more codes eventually. More or less just a few resistors, this post you can follow verbatim.