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Built my trans 68 trying to get my truck to relearn drove it two hundred miles gave me a new tune down load it drove for anther 2 hundred miles now I have a trouble code on my easy link but no check engine light is on the code is saying ecm-internal ctrl module memory checksum error I’ve turned the truck off cleared codes and it came back on does anyone know maybe know what this is I have deleted the truck also thank you
 

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Have you contacted your technician through ez lynk? That's a pcm code

Usually the pcm needs to be reflashed to fix it or replaced, try doing a fresh install of the tune again or contact the technician
 
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