There does not seem to any consistency to when this happens.
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1998 Ford F-150 Question: My airbag light comes on and flashes now and then. Is this a concern?
Answer #1G. T. Service Center (4075 Answers) , Stephenville, TX - (254) 638-3236ProfessorG October 30, 2013, 17:32Master
It will be fine if someone doesn't pull out in front of you! Seriously take it to someone and have the SRS system diagnosed, the airbags might not work if you get into an accident.
Reply1998f1500, October 30, 2013, 21:23Rookie