P0420 code but no DIC failure - Saab 9-5 Bulletin Board - Saabnet.com
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2003 9-5 Arc/v6 (122k) is throwing P0420. No DIC failures at all, car is running great.
Changed front rotors and pads over memorial day weekend, but that seems to just be coincidental.
Any thoughts? Search turns up that this is common for a cat failure post DIC failure. Should I suspect rear o2 sensor? Thanks!
->Posting last edited on Fri, 1 Jun 2018 07:52:40.
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01 9-3 Viggen
03 9-5 Arc
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