2009 Chrysler PT Cruiser Owner Manual - Page 268

266 STARTING AND OPERATING CAUTION! After inspecting or adjusting the tire pressure, always reinstall the valve stem cap. This will prevent moisture and dirt from entering the valve stem, which could damage the Tire Pressure Monitoring Sensor. NOTE: • TPMS is not intended to replace normal tire care and maintenance, or to provide warning of a tire failure or condition. • TPMS should not be used as a tire pressure gauge while adjusting your tire pressure. • Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling and stopping ability. • TPMS is not a substitute for proper tire maintenance, and it is the driver's responsibility to maintain correct tire pressure using an accurate tire pressure gauge, even if under-inflation has not reached the level to trigger illumination of the TPMS Telltale Light. • Seasonal temperature changes will affect tire pressure, and the TPMS will monitor the actual tire pressure in the tire. Base System The TPMS uses wireless technology with wheel rimmounted 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.