A system and method for detection of a pressure leak rate in a tire (12) supporting a vehicle (14) is disclosed. The system (10) comprises a sensor (30) mounted on the tire (12) for measuring a pressure (52) of the tire (12) and means for transmitting measured pressure data from the sensor (30) to a processor (38, 48). The processor (38, 48) is configured to: receive a plurality of measured tire pressures; batch the plurality of measured tire pressures according to a batch commencing on a batch starting point (62); detect a changepoint in measured tire pressures with a changepoint detection module (66); add a current measured tire pressure to the batch (78) in a storage queue (70) when the detection module (66) does not detect the changepoint; calculate a leak rate (80) for the batch (78) with a leak rate determination module (86) when the storage queue (70) reaches a predetermined size; compare the leak rate (80) to a predetermined threshold with a comparison module (88); issue an alert with an alert module (92) when the leak rate (80) crosses the predetermined threshold; and transmit the alert to at least one of a vehicle control system and a display device (50) for actuation of the vehicle (14) in response to the alert.
