There is a company in Florida that sells computers with lifetime warranty (on e-bay). The first one they sent me started the Durango once and then hard failed. The second one worked great, but had the CEL on. The two codes presented were odd, but one of them for a component that did not appear to have ever been there. Turns out they sent me one for California emissions and my Durango is a 49-state. So, yes it is very possible that they sold you the wrong one. Double check everything.

What year, engine, etc.?