A tire pressure management system for a tractor/trailer system uses exterior sidewall mounted tire RFID tags, valve mounted tire pressure sensors and transmitters, radio repeaters, a tire pressure management system receiver with controller area network interface, a body computer for execution of software modules of the system and a controller area network for carrying data between the body computer and tire pressure management system receiver. The system provides varying functionality depending upon which elements are present. To deal with absence of a tractor, variation in the complimentary TPMS components installed on the tractor, or lack of any complimentary TPMS components installed on the tractor a trailer mounted repeater includes sufficient local processing power and display capability to alert users of any tire pressure problem on the trailer.