po404 2000 gmc safari 4.3 I replace egr & wire plug too egr valve code keeps coming back

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Carguy1 · Answer 1 · 2019-02-12T18:18:56+0000

Hi there,

Here is a list of possible causes for an EGR code.

P0404 GMC - Exhaust Gas Recirculation Open Position Performance

Read more: https://www.autocodes.com/p0404_gmc.html