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Old 09-25-2007, 03:37 AM
Aaron_Provost's Avatar
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Default check engine light

I recently installed a hogan downpipe in my 2007 SS Monte Carlo. After a few days of driving my check engine light came on. Does anyone know how to reset the system to get rid of this problem. thanks.
 
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Old 09-25-2007, 10:12 AM
Join Date: Oct 2006
Location: North Fond du Lac, WI
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Default RE: check engine light

WELCOME TO MCF AARON!!!

20 to 1 it is actually a code p420 which means that Cat isn't doing it's job well enough.

What you will need to do is either buy a OBD2 scanner for about $100 and that will allow you to clear the code that pops up every 3 weeks or so. Otherwise buy an HPTuners programmer for $500 and you will be able to program the PCM to not throw the code anymore.
 
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