brake and check engine light flashing

I changed the battery in my girlfriends old 95 nissan sentra. After driving it, the brake and check engine lights were on and flashing. Anything I can try and do to fix this? The fuses were all fine.

Since this question is specific to a particular make and model, you should check with the specific forum. Infiniti (another Nissan brand) has some peculiar calibrations that sometimes need to be run after changing a battery and will cause the brake and CEL lights to come on or flash. I seem to recall that on the Infiniti it involves calibrating the electronic throttle body. I'm sure the '95 Sentra does not have an electronic throttle body, but the Sentra forum could likely point you in the correct direction.

-Rod