Jeep CHEROKEE 2021 Owner's Manual page 282

280 SAFETY
molded into the tire sidewall. The tire pressure
will also increase as the vehicle is driven. This is
normal and there should be no adjustment for
this increased pressure.
See Ú page 395 on how to properly inflate the
vehicle's tires.
The TPMS will warn the driver of a low tire
pressure if the tire pressure falls below the
low-pressure warning limit for any reason,
including low temperature effects and natural
pressure loss through the tire.
The TPMS will continue to warn the driver of low
tire pressure as long as the condition exists, and
will not turn off until the tire pressure is at or
above the recommended cold placard pressure.
Once the low tire pressure warning (Tire Pressure
Monitoring Warning Light) illuminates, you must
increase the tire pressure to the recommended
cold placard pressure in order for the Tire
Pressure Monitoring Warning Light to turn off.
The system will automatically update and the
Tire Pressure Monitoring Warning Light will turn
off once the system receives the updated tire
pressures. The vehicle may need to be driven
for up to 20 minutes above 15 mph (24 km/h)
in order for the TPMS to receive this
information.
For example, your vehicle may have a
recommended cold (parked for more than
three hours) placard pressure of 33 psi (227
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 low enough
to turn on the Tire Pressure Monitoring Warning
Light. Driving the vehicle may cause the tire
pressure to rise to approximately 28 psi
(193 kPa), but the Tire Pressure Monitoring
Warning Light will still be on. In this situation, the
Tire Pressure Monitoring Warning Light will turn
off only after the tires are inflated to the vehicle's
recommended cold placard pressure value
Ú page 423.
NOTE:
When filling warm tires, the tire pressure may
need to be increased up to an additional 4 psi
(28 kPa) above the recommended cold placard
pressure in order to turn the Tire Pressure Moni-
toring Warning Light off.
CAUTION!
The TPMS has been optimized for the orig-

inal equipment tires and wheels. TPMS pres-
sures and warning have been established for
the tire size equipped on your vehicle. Unde-
sirable system operation or sensor damage
may result when using replacement equip-
ment that is not of the same size, type,
and/or style. The TPM sensor is not designed
for use on aftermarket wheels, and may
contribute to a poor overall system perfor-
mance. Customers are encouraged to use
Original Equipment Manufacturing (OEM)
wheels to ensure TPMS feature operation.
Using aftermarket tire sealants may cause

the Tire Pressure Monitoring System (TPMS)
sensor to become inoperable. After using an
aftermarket tire sealant it is recommended
that you take your vehicle to an authorized
dealer to have your sensor function checked.
After inspecting or adjusting the tire pres-

sure always reinstall the valve stem cap.
This will prevent moisture and dirt from
entering the valve stem, which could
damage the TPMS sensor.