I just bought a 92 F250 7.5 with 64K and am loving it but I replaced the battery yesterday and the check engine light came on after a short drive to return the core battery and then went out after turning off and starting again. The light came back on again today after a 5min drive and then went out again, the truck runs awesome with no noticeable problems, will these be stored codes?

 

I would real the codes. The Equus Innovation 3145 is a good reader.

I'd check your battery cables. Maybe its a bad connection or ground.