why does my 96 infiniti j30 shutoff while driving on 1996 Infiniti J30

just had the check engine light took off cause of a code on there p0443 but now its still shuts off what could that be i had the part fixed thought i wont lose power any more

Asked by for the 1996 Infiniti J30
possible alternator failing. was there any after market modifications made to the sound system? is your battery able to hold strong charge? get diagnostic run, could show programming issue.