LLY: Is po402 code a problem?

Spencerflesher

New member
Mar 4, 2012
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Hey I got a 06 LLY with 250,000 miles. Best truck ever. Anyway got this excessive egr flow code while back but check engine light eventually went off. Motor is stock except for bulldog programmer. Is this something that is gonna hurt my motor of just some emission stuff I can ignore? Thanks