buick code

BUICK LESABRE
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PIGGY23
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what does code p1406 mean for a 1997 buick lesabre?
Oct 25, 2007 at 5:38 PM
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MERLIN2021
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P1406= Exhaust gas recirculation pintle error....means the EGR valve position sensor detected the EGR open at the wrong time...could need cleaning, or replacement.
Oct 25, 2007 at 5:56 PM