the way that i would go about it is first look under the passenger seat and check the wires and connections ,if they look ok just disconnect them and reconnect please make sure the ignition is off when doing this,once you have done that ,turn the ignition on and see if the airbag light goes out,if not turn ignition off and do the same to the drivers seat, turn ignition on and see if the fault has gone, if not turn the ignition off and where your seat belt clicks into pull the trim away so you can see the hog connector on top of the pretensioner make sure they are pushed on correctly, then turn ignition on again if the fault is still present you will need to have it looked at ,they will be able to diagnose the fault with there computer.
mark
March 2006