Tire Pressure Monitoring System (Tpms) - Chrysler PT Cruiser Owner's Manual

264 STARTING AND OPERATING

TIRE PRESSURE MONITORING SYSTEM (TPMS)

The TPMS will warn you of a low tire pressure based
on the vehicle recommended cold placard pressure.
The tire pressure will vary with temperature by about
1 psi (7 kPa) for every 12°F (7°C). This means that
when the outside temperature decreases, the tire pres-
sure will decrease. Tire pressure should always be set
based on cold inflation tire pressure. This is defined as
the tire pressure after the vehicle has not been driven
for at least three hours, or driven less than 1 mile
(1.6 km) after a three-hour period. The cold tire
inflation pressure must not exceed the maximum
inflation pressure molded into the tire sidewall. Refer
to the "Tires – General Information" in this section for
information on how to properly inflate the vehicle's
tires. The tire pressure will also increase as the vehicle
is driven - this is normal and there should be no
adjustment for this increased pressure.
TPMS will warn you 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.
TPMS will continue to warn you 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
has been illuminated, you must increase the tire pres-
sure to the recommended cold placard pressure in
order for the Tire Pressure Monitoring Telltale Light to
turn off. The system will automatically update and the
TPMS Telltale 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
(25 km/h) in order for the TPMS to receive this
information.