RAM 2500 2021 Owner's Manual page 326

324 SAFETY
NOTE:
The TPMS is not intended to replace normal

tire care and maintenance or to provide
warning of a tire failure or condition.
If your vehicle is not equipped with the Tire

Fill Alert feature the TPMS should not be used
as a tire pressure gauge while adjusting your
tire pressure.
Driving on a significantly underinflated tire

causes the tire to overheat and can lead to
tire failure. Underinflation also reduces fuel
efficiency and tire tread life, and may affect
the vehicle's handling and stopping ability.
The TPMS is not a substitute for proper tire

maintenance, and it is the driver's responsi-
bility to maintain correct tire pressure using
an accurate tire pressure 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.
Example: Tire Pressure Monitoring Display
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.
NOTE:
It is particularly important for you to check the
tire pressure in all of the tires on your vehicle
monthly and to maintain the proper pressure.
The TPMS consists of the following
components:
Receiver module

Four Tire Pressure Monitoring System

sensors
Various Tire Pressure Monitoring System

messages, which display in the instrument
cluster
Tire Pressure Monitoring System Warning

Light
Tire Pressure Monitoring System Low
Pressure Warnings
The Tire Pressure Monitoring System
Warning Light will illuminate in the
instrument cluster when tire pressure
is low in one or more of the four active
road tires. In addition, the instrument cluster
will display a graphic showing the pressure
values of each tire with the low tire pressure
values in a different color. An "Inflate to XX"
message will also be displayed.
Example: Low Tire Pressure Display