1998 Buick Century EGR

1998 BUICK CENTURY
99,000 MILES • 6 CYL • FWD • AUTOMATIC
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SCOOTERPOOT
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I cleaned the EGR valve and repalaced the gasket. The service engine light stiill comes on after about ten miles. The code is 401.
Insufiiciant air flow
The intake at the EGR did not seemed clogged.

What gives ? Thanks
Oct 22, 2008 at 6:08 PM
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DOCFIXIT
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Is valve opening?
Oct 23, 2008 at 11:18 AM