How temperature affects your tire pressure
The tire pressure monitoring system (TPMS) 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 TPMS as being significantly lower than the recommended inflation
pressure and activate the TPMS 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.
CHANGING A ROAD WHEEL
WARNING:
The use of tire sealants may damage your tire
pressure monitoring system and should not be used. However, if
you must use a sealant, the TPMS sensor and valve stem on the wheel
must be replaced by an authorized Ford dealer.
WARNING:
See
Tire Pressure Monitoring System
in this
chapter for important information. If the tire pressure monitor
sensor becomes damaged, it will no longer function.
Note:
The tire pressure monitoring system indicator light will illuminate
when the spare tire is in use until the spare’s TPMS sensor is trained.
If you get a flat tire while driving, do not apply the brake heavily.
Instead, gradually decrease your speed. Hold the steering wheel firmly
and slowly move to a safe place on the side of the road.
Have a flat serviced by an authorized dealer in order to prevent damage
to the TPMS sensors, see
Tire Pressure Monitoring System
earlier in
the chapter. During repairing or replacing of the flat tire, have the
authorized dealer inspect the TPMS sensor for damage.
278
Wheels and Tires
2013 Police
(pol)
Owners Guide gf, 2nd Printing
USA
(fus)