RetroGamer

I Put on a used but low mileage oem cat with o2 sensor, plugged it in to stock plug all good. But on a brand new dc sport full catback exaust. Everything went smooth only thing was my old cat and exaust was rusted togethr so I took it all off in one piece so I wasn't sure if there was a gasket that goes from the cat to the pipe. The cat going to the headers was nice and smooth didn't look like a gasket ever went there. Everything sounds great nice deep low sound. The once problem is the check engine light is now on. I did fire up the care when I had the exaust off just to see how loud it was but only for a few secs. So is there something I need to reset to take that light off and is there a gasket that goes from pipe to stock oem cat. The guy at the place I bough it from said it didn't come with one. Thx for any help.

HondaPartsHero

Did you pull the code? What is your make and model?

#20 18229-S01-X11 GASKET, EX. FLEXIBLE
#25 18393-SH3-S00 GASKET, PRE CHAMBER (52.5MM-53.5MM)

RetroGamer

Well I need to order a gasket on eBay because it doesn't have one right now On the 25 part. So do I need to order a 53mm on eBay? As far as the code goes I have no idea were I would pull that. It's a 2000 civic si.

HondaPartsHero

Either stop by Autozone to get them to pull the code or do it manually here:
https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/how-pull-cel-d4-srs-abs-codes-code-lists-1901557/

Just get the gasket for 99-00 Civic Si. I mean they're only 7-8 dollars from Honda you might as well get it there or Autozone/Advance are going to be the same range.

RetroGamer

Is this the correct gasket for the 25 part?
http://cgi.ebay.com/ebaymotors/ws/eB...ht_3427wt_1008

I also have a dc sport header coming in the mail I'm guessing they dont come with a ring or gasket at the bottom end?I already ordered a new header gasket for them.

RetroGamer

Ok so autozone will have the gaskets cool.

Former User

Pull the CEL codes, and then reset the ECU to see whether the code(s) repeat.