Ford Focus Owner's Manual page 205

In case there is a problem with the
front passenger sensing system, the
airbag readiness lamp in the
instrument cluster will stay lit.
If the airbag readiness lamp is lit, do the following:
The driver and/or adult passengers should check for any objects that
may be lodged underneath the front passenger seat or cargo interfering
with the seat.
If objects are lodged and/or cargo is interfering with the seat; please take
the following steps to remove the obstruction:
• Pull the vehicle over.
• Turn the vehicle off.
• Driver and/or adult passengers should check for any objects lodged
underneath the front passenger seat or cargo interfering with the seat.
• Remove the obstruction(s) (if found).
• Restart the vehicle.
• Wait at least two minutes and verify that the airbag readiness lamp is
no longer illuminated
• If the airbag readiness lamp remains illuminated, this may or may/not
be a problem due to the front passenger sensing system.
DO NOT attempt to repair or service the system; take your vehicle
immediately to an authorized dealer.
If it is necessary to modify an advanced front airbag system to
accommodate a person with disabilities, contact the Ford Customer
Relationship Center at the phone number shown in the Customer
Assistance section of this owner's guide.
WARNING: Any alteration/modification to the front passenger seat
may affect the performance of the front passenger sensing system.
2012 Focus (foc)
Owners Guide, 5th Printing
USA (fus)
Seating and Safety Restraints
205