a tire pressure management system for a tractor / trailer system establishes allowable bounds for tire pressure compensated for temperature and determines leaks after determining that internal tire temperature measurements are not available . the system is based on valve - mounted external tire pressure sensors , wireless connections to uplink tire pressure data , keyed by location , an ambient temperature sensor and an onboard computer . tires are assumed pressurized to a target pressure at a given temperature with minimum and maximum pressure bounds set around the target pressure . ambient temperature sensing , and determination that tires are likely to be at ambient temperature , allows adjustment of the minimum and maximum bounds , as well as the target pressure , compensated for temperature and thus a judgement made as to whether the cold pressure reading indicates deviation from acceptable limits . determination of whether the vehicle is , or has recently been in movement , is made allowing internal temperature of the tires to be estimated based on changes in pressure . inter - comparison of pressure readings from among the tires is used to determine the occurrence of leaks during vehicle operation .