Chrysler PT Cruiser Owner's Manual page 269

NOTE: It is particularly important for you to perform a
monthly tire pressure check on, and to maintain the
proper pressure of all the tires on your vehicle.
The TPMS consists of the following components:
Receiver Module
Four Tire Pressure Monitoring Sensors
Tire Pressure Monitoring Telltale Light
Tire Pressure Monitoring Low Pressure Warnings
The TPMS Telltale Light will illuminate in the
instrument cluster and a chime will sound when
tire pressure is low in one or more of the four
active road tires. Should this occur, you should stop as
soon as possible, check the inflation pressure of each tire
on your vehicle, and inflate each tire to the vehicle's
recommended cold placard pressure value. Once the
system receives the updated tire pressures, the system
will automatically update and the TPMS Telltale Light
will turn off. 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.
Check TPMS Warning
The TPMS Telltale Light will flash on and off for 75 sec-
onds and then remain on solid when a system fault is
detected. The system fault will also sound a chime. If the
ignition key is cycled, this sequence will repeat, provid-
ing the system fault still exists. The TPMS Telltale Light
will turn off when the fault condition no longer exists. A
system fault can occur due to any of the following:
1. Signal interference due to electronic devices or driving
next to facilities emitting the same radio frequencies (RF)
as the TPMS sensors.
2. Installing aftermarket window tinting that contains
materials that may block radio wave signals.
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