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p0420
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  1. Engine Modifications
    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...
  2. Member Show-Off & Photography
    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...
  3. General Maintenance, Troubleshooting & Accidents.
    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...
  4. Maintenance, service, and repair
    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 ???
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