Passenger airbag off?

My mom hit my 2011 Honda Civic on the rear bumber. It was just a small scratch but since then the Passenger Air Bag off light has been on. Is there a way to fix it or should I take it to be repaired?
Added (1). My bad, it said Side Airbag not passenger.
@Gary it's a small garage and it was an accident no fraud, no insurance claim is being made and it's a small dent.

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