FORD 2010 Expedition v.3 - Manual (Page 268)

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 pressure
warning light Possible cause Customer action required
Solid warning light Tire(s)
under-inflated 1. Check your tire pressure to
ensure tires are properly
inflated; refer to Inflating
your tires in this chapter.
2. After inflating your tires to
the manufacturer’s
recommended inflation
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 will turn off.
Spare tire in use Your temporary spare tire is in
use. Repair the damaged road
wheel/tire and reinstall it on
the vehicle to restore system
functionality. For a description
on how the system functions,
refer to When your temporary
spare tire is installed in this
section.
TPMS
malfunction If your tires are properly
inflated and your spare tire is
not in use and the light
remains on, contact your
authorized dealer as soon as
possible.
Tires, Wheels and Loading
268
2010 Expedition (exd)
Owners Guide, 3rd Printing
USA (fus)