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I was cruisin around..at about 40 mph and my cel came on...I check the code from the ecu and it gave me a code 67..which is a catalyst coverter misfunction or something like that..can someone tell me what I should check to fix this? I already tried reseting the ecu by disconnecting the battery...for at least 15 minutes..and connecting it back..and still the cel comes back on when I hit around 40 mph again. I currently have cold air intake..full exhaust kit, headers on 00 Civic SI. Anyways this just started happening a few months ago when I got my alarm installed, but it went away when I reset the ecu..but now its back and it looks like it's not going away.
Anybody has any suggestions before I take it to Honda for a system diagnostic?
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