Search Results for ‘p0420’

Hello all! I have a 2021 wrx with 20k miles. I got cel P0420 AFR is at 14.7 while driving. I have a Grimspeed v2 gesi catted j pipe, remark catback as well. I’ve had Jpipe installed for about 3 months and exhaust for a year or so. Car is pro tuned at the moment. Any idea what it could be before...

Hey guys I just purchased a 2015 wrx about a month ago now. And being that I’ve had a little time to understand the car a little better I now have some questions about it. I got a CEL code P0420 and I changed the 02 sensor and now i wondering if it’s actually my cats. I looked into getting a...

I have a 2015 wrx base and recently bought AP for it. I finally got into the workings of how and what to use on it and when I pulled up my DAM it dropped too .850 then some more and more and came back up and is now hovering around .688. It threw a history fault code a while back that I had...

Car went in the shop a while back for P0001 code, they replaced an oil control valve that was faulty, leading to a lack of oil reaching the cam and cleard the code. All seemed well until about a month later, car backfired after shifting from 5th to 6th (barely on it) and threw a CEL. New code...

Hi all, I have an 03 WRX that is bone stock and had a code p0420 for bank 1 cat. I changed out the downpipe/stock cat with a Bosal "oem" cat. Looks to be pretty much the same minus all the heat shielding the factory cat has. I also put on new multi layered steel gaskets to ensure the whole...

So my 2010 wrx is in shop right now getting turbo Inlit replaced replaced... can that cause a catalytic threshold to come up... once I replace the hose will it go away? Or is it done for in the cat or sensor ???