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Diagnostic code p0401 egr flow insufficent ?

(1998 Buick Century)
in Blackwood, NJ on January 05, 2011
diagnostic code p0401 egr flow insufficient making check engine light come on . what is the cause.
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Popular Answer
on January 05, 2011
usually a clogged vaccuum port in throttle body.
if they are clear, the valve may be bad. have it checked to verify.

Roy
on January 05, 2011
THANK YOU I WILL CHECK THAT.
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