When Inflating Your Tires; How Temperature Affects Your Tire Pressure - Lincoln 2011 MKX Owner's Manual

Tires, Wheels and Loading
Low tire Possible
pressure cause
warning
light
Flashing Spare
warning light tire in
use
TPMS
malfunc-
tion

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 (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
over night 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
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.
196
2011 MKX (mkx)
Owners Guide, 1st Printing
USA (fus)
Customer action required
Your temporary spare tire is in use. Repair
the damaged road wheel and re-mount it on
the vehicle to restore system functionality.
For a description of how the system func-
tions under these conditions, 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 TPMS warn-
ing light still flashes, contact your authorized
dealer as soon as possible.