CEL-code P0404 - Diesel Bombers

Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

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Old 06-20-2013, 09:21 PM
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Join Date: Jun 2013
Posts: 1
Default CEL-code P0404

My CEL keeps coming on and giving the code P0404 which says something like Exhaust Gas Recirculation open performance. I changed EGR valve and it still came on I had it cleared today and it came on again within 10 miles can anyone help please?
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Old 10-23-2013, 10:20 PM
Join Date: Jun 2013
Location: Lancaster, CA
Posts: 2

Is your vacuum pump working good? Where did you get the EGR valve from?
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