Thread: P0420 ?
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Old 05-02-2013, 10:58 AM   #13
Scooby Guru
Member#: 134005
Join Date: Dec 2006
Chapter/Region: MAIC
Location: Pittsburgh, PA
2004 WRX Premium


"From the downpipe"... so does that include the downpipe? lol.

If it does, most likely you're throwing the code because you don't have a cat and the car is just figuring this out... which seems odd.

I think you're referring to a catback and stock cat/downpipe. If so, with an 02, the cat's probably done. Time to go stage 2!
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