FORD 2012 F-550 v.2 - Manual (Page 239)

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. 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.
Spare tire 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 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.
Tire rotation
without sensor
training On vehicles with different front and
rear tire pressures, the TPMS must
be retrained following every tire
rotation. See Tire rotation in this
chapter.
Tires, Wheels and Loading
239
2012 F-250/350/450/550 (f23)
Owners Guide, 2nd Printing
USA (fus)