How to fix P0420 code with non Fowlers (cheap & easy) 

for those that don't know. this is for the bottom o2 sensors and yes it works.

Great video very detail 👍

It works AWSOME. Did it on a Honda with 275k miles on it and don’t want to spend 1200 bucks on a Ca only Cat.

as the 420 code can be caused by a number on issues w/the car, not sure how you can say that this fix will clear the code.

I have an 04 sequoia with PO420 code. I can't use a non fouler because my downstream O2 sensors are bracket or flange type mount. Anyone have this issue?

Do Non Fowlers prevent hens?

Will this pass smog check?

Ciao ho provato sulla mi 500 abarth con errore p0420 con il distanziatore , ma non ho trovato beneficio anzi al contrario va peggio di prima. Non capisco perché.grazie se sai come fare fammi sapere

How does this work without a mini cat inside? And also wouldn’t it be better to use a J-joint positioned forwards? Seems like the dirty air could still make its way inside that extender

I own a 2017 F150 3.5L naturally aspirated. I have an o2 sensor on the cat, which i have gutted , and an o2 sensor after the cat. Which one should i use the non foulers on?

This will probably turn code off but fixes nothing. Engine Exhaust is still restricted by a clogged cat. Creating unwanted back pressure on Engine.

Problem is everyone the O2 monitor will not ready if you add the defowler and if in CA wont pass smog. CA emissions on some vehicles are too tight for example My 2003 Silverado is allowed 1004 parts per million but will not pass because it is sometimes putting out 1006 PPM so CA wants me to buy a $2500 dollar CAT which is made and sold in CA. So now I have to drive my 69 F100 which puts out 500,000 PPM but is smog exempt. Not what I want to do but what I have to do. What sucks to is the State can BIT flip your ECM to give a bad reading forcing you to buy a new car Yaaaaaay dictatorship

Can I do this on my honda element 2004 can't got rid of the code and still dont pass inspection

I got the check engine light with Po420 code but every time I drive 45min-1 hour on the highway the check engine light goes away for a day or two then come back on?

Would this work on a 2010 ford escape v6?

my cat rattles , for two years no trouble , engine started sputtering recently (2004 escape) . I think i am out of options, oh well, It rattled when I bought it used it with no issues.

so one spacer wont work? i see you are using two

I did this to my daughter’s car. After about 4 months she got a code saying the system is running too lean. Now what?

How to know which sensor to do this to?

Just replace the sensor & spray the catalytic converter with sea foam

It just masks the problem, the problem is still there, which is most likely fked up or clogged cat.

This is what you do after cutting the catalytic converter off to keep the engine light from tripping. Never do this with an old and clogged catalytic converter still on the exhaust system. You will destroy your engine by making it run too rich.

This doesn’t fix anything

ILLEGAL!!! We see stupid shit like this come through our shop occasionally. Why does it end up in our shop? Because it eventually fails and costs the owner of the vehicle even more to fix correctly in the long run! You're only asking for more trouble in the long run if you follow this method 🙄

This is called tampering with the emission system. It is also against the law. The clean air act. Just a FYI