It should go away I had this same issue when I installed my pioneer... did you turn the ignition on with anything unplugged? Freaked me out when it happened but turns out air bag light comes on if you cycle the ignition with anything unplugged.
More specifically I believe its related to the red air bag light / clock display under radio. If ignition is turned on with that unplugged you'll get the light on dash. Mine reset itself within 5 min or so. Good luck and let us know the outcome!
