I had a battery changed by a local national auto parts store. Within minutes of restarting the engine, the check engine light and warning came on. The ODB2 port has no power and I cannot figure out what fuse may be blown. I have driven ca. 60 miles and the light and warning remain illuminated.

1. Any idea as to what fuse serves the ODB2 port?
2. Given the battery change/warning light/dead port (and temporal relationship) should I worry there is actually an engine issue?

(Battery terminals seem secure).
Thanks