Ford Mustang Owner's Manual page 189

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
pressure cause
warning light
Solid warning light Tire(s)
under-inflated
Spare tire in
use
TPMS
malfunction
2011 05+ Mustang (197)
Owners Guide, 1st Printing
USA (fus)
Tires, Wheels and Loading
Customer action required
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.
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.
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.
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