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Re: Full 3" system and code P0420 Posted by ryan [Email] (#2222) [Profile/Gallery] (more from ryan) on Mon, 27 Sep 2010 12:31:48 In Reply to: Full 3" system and code P0420, Paul in NM, Mon, 27 Sep 2010 12:04:43 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I just posted about this situation on my Viggen with a GS 3" DP and cat (on the 900 board). It sounds like this situation is caused by the location of the cat, as well as the fact that this flows so much better, and so now it doesn't get up to its effective temperature unless it's being driven harder. I've tripped P0420 probably 6 times, and it's ALWAYS when I'm driving very gently (ie. flat highway, 60 mph, not accelerating). Does this sound like how you were driving when it happened?
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