Catalyst code??
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1st Gear
Joined: Feb 2010
Posts: 51
From: Phoenix, AZ
Catalyst code??
I just bought my car 3 weeks ago and the check engine light has came on twice so far with a "Catalyst System Efficiency Below Threshold " on the OBD 2 scanner.
CODE: P0420
The car isnt stock, it has 3" stainless exhaust, Forge 004 BOV, and more but I think these may be the only mods that might relate to the problem, no big turbo or anything, can I prevent this check engine light from returning?
CODE: P0420
The car isnt stock, it has 3" stainless exhaust, Forge 004 BOV, and more but I think these may be the only mods that might relate to the problem, no big turbo or anything, can I prevent this check engine light from returning?
Last edited by fly200; Mar 20, 2010 at 05:05 AM.
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