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1998 Buick Century Question: diagnostic code p0401 egr flow insufficent ?

 

Question

JOHN DANICO, Blackwood, NJ, January 05, 2011, 15:24
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diagnostic code p0401 egr flow insufficient making check engine light come on . what is the cause.

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  • Answer #1

    mastertech6371 January 05, 2011, 15:30
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     Master

    usually a clogged vaccuum port in throttle body.
    if they are clear, the valve may be bad. have it checked to verify.

    Roy

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    JOHN DANICO, January 05, 2011, 15:36
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    THANK YOU I WILL CHECK THAT.

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