Jeep GRAND CHEROKEE 2022 Owner's Manual page 263

For example, your vehicle has a recommended cold
(parked for more than three hours) tire pressure of
36 psi (248 kPa). If the ambient temperature is 68°F
(20°C) and the measured tire pressure is 28 psi
(193 kPa), a temperature drop to 20°F (-7°C) will
decrease the tire pressure to approximately 24 psi
(165 kPa). This tire pressure is sufficiently low enough
to turn on the TPMS Warning Light. Driving the vehicle
may cause the tire pressure to rise to approximately
28 psi (193 kPa), but the TPMS Warning Light will still
be on. In this situation, the TPMS Warning Light will turn
off only after the tires have been inflated to the
vehicle's recommended cold tire pressure value.
CAUTION!
The TPMS has been optimized for the original

equipment tires and wheels. TPMS pressures
and warnings have been established for the tire
size equipped on your vehicle. Undesirable
system operation or sensor damage may result
when using replacement equipment that is not
of the same size, type, and/or style. The TPMS
sensor is not designed for use on aftermarket
wheels and may contribute to a poor overall
system performance or sensor damage.
Customers are encouraged to use OEM wheels
to ensure proper TPMS feature operation.
Using aftermarket tire sealants may cause the

Tire Pressure Monitoring System (TPMS) sensor
to become inoperable. After using an after-
market tire sealant it is recommended that you
take your vehicle to an authorized dealership to
have your sensor function checked.
After inspecting or adjusting the tire pressure,

always reinstall the valve stem cap. This will
prevent moisture and dirt from entering the
valve stem, which could damage the Tire Pres-
sure Monitoring System sensor.
NOTE:
The TPMS is not intended to replace normal tire

care and maintenance, or to provide warning of
a tire failure or condition.
The TPMS should not be used as a tire pressure

gauge while adjusting your tire pressure, unless
equipped with Tire Fill Alert.
Driving on a significantly underinflated tire

causes the tire to overheat and can lead to tire
failure. Underinflation also reduces fuel effi-
ciency and tire tread life, and may affect the
vehicle's handling and stopping ability.
(Continued)

CAUTION!

The Tire Pressure Monitoring System (TPMS) uses
wireless technology with wheel rim-mounted
electronic sensors to monitor tire pressure levels.
Sensors, mounted to each wheel as part of the
valve stem, transmit tire pressure readings to the
receiver module.
SAFETY
The TPMS is not a substitute for proper tire
maintenance, and it is the driver's responsibility
to maintain correct tire pressure using an accu-
rate tire gauge, even if underinflation has not
reached the level to trigger illumination of the
TPMS Warning Light.
Seasonal temperature changes will affect tire
pressure, and the TPMS will monitor the actual
tire pressure in the tire.
Tire Pressure Monitoring System Display
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