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code ?

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wicksfish
 Post subject: code ?
 Post Posted: Thu Oct 08, 2009 10:10 am 
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Joined: Thu Oct 08, 2009 9:50 am
Posts: 1
2006 gmc stock tirers mbrp-exhaust
error code po 401 what the next step for repair?[code][/code]
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RON @ SUPERCHIPS
 Post subject: Re: code ?
 Post Posted: Thu Oct 08, 2009 10:25 am 
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Joined: Tue Jul 25, 2006 9:41 am
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p0401 is related to EGR valve flow. Possible bad EGR, check passageway under EGR to see if its plugged

Ron

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Board index » VEHICLE SPECIFIC » GM Duramax

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