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

CEL-code P0404

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Old 06-20-2013, 08:21 PM
wkoehn's Avatar
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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, 09:20 PM
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Is your vacuum pump working good? Where did you get the EGR valve from?
 
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