Full 3" system and code P0420 - Saab Performance Bulletin Board - Saabnet.com
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Full 3" system and code P0420
Posted by Paul in NM [Email] (more from Paul in NM) on Mon, 27 Sep 2010 12:04:43
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I have a Jak Stoll 3" dp with full flow cat connected to a full 3" system with magnaflow exhaust on my 2002 Aero auto 95K. It's been a thing of beauty for the last 5K miles.
I just got a check engine light and code P0420 (cat not efficient). I'm wondering if anyone else has experienced this with a similar set up. My 02 sensors are brand new as was the cat that was put on. My ECU is stock btw. Could the stock ECU and the small, full flow cat have anything to do with it?
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