Subjects>Auto>American Cars

CODE 0404 Cadillac

Anonymous

∙ 13y ago

Updated: 9/11/2023

I'm not sure what year and model you Cadillac is but a p0404 should be for the EGR valve open position performance. You will need to replace the egr valve if the wires are okay. Hope this is helpful.

Wiki User

∙ 13y ago

What else can I help you with?

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