diagnostic code p0401 egr flow insufficent ?

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diagnostic code p0401 egr flow insufficient making check engine light come on . what is the cause.

JOHN DANICO in Blackwood NJ

Jan 5, 2011

1 Reply

Popular Answer

user91328on Jan 5, 2011

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

JOHN DANICO

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RepairPal Certified shops can diagnose and repair your 1998 Buick Century. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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1 Reply

Popular Answer

user91328on Jan 5, 2011

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

JOHN DANICO

What are the best Buick repair shops?

RepairPal Certified shops can diagnose and repair your 1998 Buick Century. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.