1. Turn the ignition key to the "On" position, but do not start the engine.
2. Press and hold the "Trip Reset" button on the instrument panel for at least 5 seconds.
3. The airbag warning light should flash and then turn off.
4. Start the engine and allow it to run for at least 1 minute.
5. The airbag warning light should now be off and the passenger airbag should be reset.
If the airbag warning light does not reset, you may need to take your vehicle to a Ford dealer or qualified repair shop to have the airbag system diagnosed and repaired.