Low tire
pressure
warning lightPossible cause Customer action required
Flashing warning
lightSpare tire in use Repair the damaged road wheel and
tire and reinstall it on the vehicle to
restore system function. For a
description on how the system
functions, seeWhen your
temporary spare tire is installedin
this section.
Tire pressure
monitoring
system
malfunctionIf 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.
When inflating your tires
When putting air into your tires (such as at a gas station or in your
garage), the tire pressure monitoring system may not respond
immediately to the air added to your tires.
It may take up to two minutes of driving over 20 mph (32 km/h) for the
light to turn off after you have filled your tires to the recommended
inflation pressure.
How temperature affects your tire pressure
The tire pressure monitoring system monitors tire pressure in each
pneumatic tire. While driving in a normal manner, a typical passenger tire
inflation pressure may increase approximately 2 to 4 psi (14 to 28 kPa)
from a cold start situation. If the vehicle is stationary overnight with the
outside temperature significantly lower than the daytime temperature, the
tire pressure may decrease approximately 3 psi (21 kPa) for a drop of 30°F
(17°C) in ambient temperature. This lower pressure value may be detected
by the system as being significantly lower than the recommended inflation
pressure and activate the system warning light for low tire pressure. If the
low tire pressure warning light is on, visually check each tire to verify that
no tire is flat. If one or more tires are flat, repair as necessary. Check air
pressure in the road tires. If any tire is under-inflated, carefully drive the
vehicle to the nearest location where air can be added to the tires. Inflate
all the tires to the recommended inflation pressure.
368Wheels and Tires
2013 F-250/350/450/550(f23)
Owners Guide gf, 3rd Printing, December 2012
USA(fus)
