Ford Focus Owner's Manual page 295

To restore the full functionality of the tire pressure monitoring system,
have the damaged road wheel and tire assembly repaired and remounted
on your vehicle. For additional information, see Changing Tires with a
TPMS in this section.
When You Believe Your System Is Not Operating Properly
The main function of the tire pressure monitoring system is to warn you
when your tires need air. It can also warn you in the event the system is no
longer capable of functioning as intended. Please refer to the following
chart for information concerning your tire pressure monitoring system:
Low tire Possible cause Customer action required
pressure
warning light
Solid warning Tire(s)
light under-inflated
Spare tire in use Repair the damaged road wheel
TPMS
malfunction
2013 Focus (foc)
Owners Guide gf, 1st Printing
USA (fus)
Wheels and Tires
1. Make sure tires are at the proper
pressure. See Inflating Your Tires
in this chapter.
2. After inflating your tires to the
manufacturer's recommended
pressure as shown on the Tire
Label (located on the edge of
driver's door or the B-Pillar), the
vehicle must be driven for at least
two minutes over 20 mph
(32 km/h) before the light turns
off.
and tire and reinstall it on the
vehicle to restore system
functionality. For a description on
how the system functions, see
When Your Temporary Spare Tire
is Installed in this section.
If the tires are properly inflated
and the spare tire is not in use but
the light remains on, contact your
authorized dealer as soon as
possible.
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