The link Quik posted up there ^ has a list of all the codes. To determine the code number you count how many times the airbag light flashes, then pauses, then flashes again.
For most people it is a 3 pause 2 or a 3 pause 6 or something like that so it would be error code 32 or 36. So use the list. Second column in the list are two digit numbers, find the correct one and look to the right and there is your problem.
Most of the time if the error talks about an air-bag it is either a loose or frayed wire or connection under the specified seat otherwise it is the clockspring. From what I've read it is a 100-150 dollar part and a 2 hour fix.