Chrysler PT Cruiser Owner's Manual page 267

For example, your vehicle may have a recom-
mended 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 approxi-
mately 24 psi (165 kPa). This tire pressure is suffi-
ciently low enough to turn ON the TPMS Telltale
Light. Driving the vehicle may cause the tire pres-
sure to rise to approximately 28 psi (193 kPa), but
the TPMS Telltale Light will still be ON. In this
situation, the TPMS Telltale Light will turn OFF only
after the tires are inflated to the vehicle's recom-
mended cold placard pressure value.
STARTING AND OPERATING 265
CAUTION!
The TPMS has been optimized for the original
equipment tires and wheels. TPMS pressures and
warning have been established for the tire size
equipped on your vehicle. Undesirable system opera-
tion or sensor damage may result when using re-
placement equipment that is not of the same size,
type, and/or style. Aftermarket wheels can cause
sensor damage. Do not use aftermarket tire sealants
or balance beads if your vehicle is equipped with a
TPMS, as damage to the sensors may result.
5