My driver’s side airbag light keeps going on under many different circumstances. Been to the dealer 3 times where they have tried to make light go on with no luck. Sometimes it just stays on after the car is started, sometimes it goes on when driving at different speeds. Sound familiar, anyone?
Contact Toyota corporate regarding the problem.
Contact info can be found in your Owner’s Manual.
I don’t know why the light comes on, but you should know that when the airbag warning light is on the airbag is disabled and will not function in the event of a crash.
The car is still under warranty, is it not? Keep going back until they fix it, and keep records of all your visits to the dealer for this, and any other problem.