I still got P0420 code even I have AMS O2 spacer in my test pipe. I am wondering any solution for this? Thanks!

 

not much you can do. Some cars the spacers work and in others they don't. Cobb AP can remove the cel and OS will be able to eventually

 

Bump...Just got this code with the same set up.

 

i'm also having this problem every other few days, the CEL P0420 will jst pop out . any way to disable it ? maybe tephra can chime in

 

What kind of tp are all of you running? I have never had a cel with my current setup. before or after having my car tuned.

 

Well then why didn't you guys remove it when you tuned my car.

I'll be happy to come back to LA and have you remove it if it can be done.

 

Do you have AP? Give us a pm

 

no AP, ecuflash can ?

 

i've tried pretty much everthing in the book to get rid of this with OS. no go. mine is either that code which means reading below thresh hold or the not dectecting it at all code. i came to the conclusion that since i'm running e85 i will see lower emissions no mater what so there is nothing i can do to "pollute" my air so it will read above the thresh hold

 

Currently, I don't believe it can.

 

Try putting a bit of steel wool within the spacer. It's a delicate balance to get just the right amount of exhaust hitting the sensor, but this has been effective in many cases!

You need to block a bit more from hitting the sensor, so a bit of steel wool should do the trick.

 

yeah i bet that would work for pump gas vehicles. in my case with e85, it makes it worse actually

 

^ Well, stay tuned (ha) for engine management methods then. There will be something out eventually

 

all test pipes give this issue?

 

I don't think so. I have a TurboXS full turbo back with test pipe. I initially threw the code, but then it went off. I'm on my 3rd tank and still no light or code. I'm on the stock tune.