Thread: P0420 Cel
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Old 06-09-2011, 02:01 AM   #8
Buffman
Scooby Newbie
 
Member#: 189212
Join Date: Sep 2008
Location: MI
Vehicle:
2019 WRX
Black

Default

Mine is on because of the single cat Downpipe. It would go on and off, and figured maybe I pinched an 02 wire, so I replaced it, and it's sitll on. I figured I might run into it with an aftermarket cat in a DP, so I'll probably just have to have it tuned out, as there's no room for a spark plug fouler.
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