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Old 11-11-2007, 02:09 PM   #1
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Just popped a code on the Scangauge
Today my check engine light just came back on and this time I caught it and didn't press clear. It says PO401 , what does that mean ? Is it something big ? What do I need to check out ? It has ran for over 40,000 miles with it on before.
Thanks,
Raz
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Old 11-11-2007, 02:12 PM   #2
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PO401 means low EGR flow. So your EGR valve probably needs a cleaning or replacement
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Old 11-12-2007, 03:53 PM   #3
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(take it off) solves that problem!
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