# Honda Guys - p0420 CEL code? **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [November 30, 2011, 8:44am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786 "2011-11-30T08:44:26Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![Jam](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jam/32/7235_2.png) [@Jam](https://forums.speedlife.net/u/Jam)\ **Post date:** [November 30, 2011, 8:44am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/1 "2011-11-30T08:44:26Z")
so my CEL went on the other day. nothing wrong mechanically at all, still drives perfect. car in question is a 98 civic lx code reads that my cat isnt working properly, and the values between the 2 o2 sensors are below threshold (this is the 1st obd2 car i have ever owned, for this reason mainly) so, i dont really want to spend $200 - $500 on replacing the cat. anyone have any success cleaning it? anyone have any suggestions? 96+ cars can suck it ---
**Author:** ![Freek](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/freek/32/7357_2.png) [@Freek](https://forums.speedlife.net/u/Freek)\ **Post date:** [November 30, 2011, 8:57am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/2 "2011-11-30T08:57:24Z")
Chip the ECU and punch out the cat. I’m not sure is Andy 99civic\_si still burns chips or not. ---
**Author:** ![Quattro\_Krant](https://avatars.discourse-cdn.com/v4/letter/q/ac91a4/32.png) [@Quattro\_Krant](https://forums.speedlife.net/u/Quattro_Krant)\ **Post date:** [November 30, 2011, 9:00am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/3 "2011-11-30T09:00:04Z")
Cleaning the cat isn’t going to do shit unless somehow cleaning the cat means rebuilding it internally. O2 sensor spacer is your friend Jam. They are cheap as hell and I’ve been running one on my slam pieces Jetta for almost a year with no problems. ---
**Author:** ![JayS](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jays/32/15375_2.png) [@JayS](https://forums.speedlife.net/u/JayS)\ **Post date:** [November 30, 2011, 9:00am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/4 "2011-11-30T09:00:21Z")
Unpossible. Honduh’s never break. ---
**Author:** ![93dx\_hatch](https://avatars.discourse-cdn.com/v4/letter/9/90ced4/32.png) [@93dx\_hatch](https://forums.speedlife.net/u/93dx_hatch)\ **Post date:** [November 30, 2011, 9:16am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/5 "2011-11-30T09:16:04Z")
Go to advanced, buy spark plug foulers, $6 gets you 2 or em ---
**Author:** ![Spam16v](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spam16v/32/5287_2.png) [@Spam16v](https://forums.speedlife.net/u/Spam16v)\ **Post date:** [November 30, 2011, 9:20am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/6 "2011-11-30T09:20:14Z")
I have great luck with 034’s spacers, work with Bosch sensors as well. ---
**Author:** ![Quattro\_Krant](https://avatars.discourse-cdn.com/v4/letter/q/ac91a4/32.png) [@Quattro\_Krant](https://forums.speedlife.net/u/Quattro_Krant)\ **Post date:** [November 30, 2011, 10:09am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/7 "2011-11-30T10:09:45Z")
![http://i78.photobucket.com/albums/j99/quattrokrant/DSCN2257-1.jpg](http://i78.photobucket.com/albums/j99/quattrokrant/DSCN2257-1.jpg) ---
**Author:** ![Jam](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jam/32/7235_2.png) [@Jam](https://forums.speedlife.net/u/Jam)\ **Post date:** [November 30, 2011, 10:24am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/8 "2011-11-30T10:24:02Z")
Hahahahahha p-rick ---------- Post added at 01:24 PM ---------- Previous post was at 01:22 PM ---------- > [@JayS](#): > > Unpossible. Honduh’s never break. I’m glad you devoted an entire thread to putting lowering springs on your car. Pretty siiqq ---
**Author:** ![Haenszel](https://avatars.discourse-cdn.com/v4/letter/h/e68b1a/32.png) [@Haenszel](https://forums.speedlife.net/u/Haenszel)\ **Post date:** [November 30, 2011, 10:27am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/9 "2011-11-30T10:27:00Z")
> [@Quattro Krant](#): > > ![http://i78.photobucket.com/albums/j99/quattrokrant/DSCN2257-1.jpg](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/3X/c/f/cfb687b63edfb143876de1a6dbf274cc6bf306ae.jpeg) they sell these at advance auto maing. And you get 2 for $6. ---
**Author:** ![Jam](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jam/32/7235_2.png) [@Jam](https://forums.speedlife.net/u/Jam)\ **Post date:** [November 30, 2011, 10:58am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/10 "2011-11-30T10:58:07Z")
So it kind of just gaps the rear o2 sensor to read less, making the car think that the cat is actually still working efficently? ---
**Author:** ![Spam16v](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spam16v/32/5287_2.png) [@Spam16v](https://forums.speedlife.net/u/Spam16v)\ **Post date:** [November 30, 2011, 11:51am UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/11 "2011-11-30T11:51:23Z")
> [@Haenszel](#): > > they sell these at advance auto maing. And you get 2 for $6. Bosch sensors don’t fit in the help section bullshit spacers, they fit in the ones from 034 like a glove. ---
**Author:** ![Quattro\_Krant](https://avatars.discourse-cdn.com/v4/letter/q/ac91a4/32.png) [@Quattro\_Krant](https://forums.speedlife.net/u/Quattro_Krant)\ **Post date:** [November 30, 2011, 12:17pm UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/12 "2011-11-30T12:17:48Z")
> [@Haenszel](#): > > they sell these at advance auto maing. And you get 2 for $6. Yeah, but you have to double stack them and drill out the bottom of the top one before you thread it into the bottom one. For an $18 cat fix, I’ll go this route all day long. Plus, 034 is the BEST company on the planet:tdown: > [@Jam](#): > > So it kind of just gaps the rear o2 sensor to read less, making the car think that the cat is actually still working efficently? Thats how I understand it ---
**Author:** ![93dx\_hatch](https://avatars.discourse-cdn.com/v4/letter/9/90ced4/32.png) [@93dx\_hatch](https://forums.speedlife.net/u/93dx_hatch)\ **Post date:** [November 30, 2011, 12:21pm UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/13 "2011-11-30T12:21:47Z")
> [@Spam16v](#): > > Bosch sensors don’t fit in the help section bullshit spacers, they fit in the ones from 034 like a glove. I’ve drilled them out and have had luck with just one spacer ---
**Author:** ![Jam](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jam/32/7235_2.png) [@Jam](https://forums.speedlife.net/u/Jam)\ **Post date:** [November 30, 2011, 12:29pm UTC](https://forums.speedlife.net/t/honda-guys-p0420-cel-code/218786/14 "2011-11-30T12:29:58Z")
Sweet! Thanks guys!