System and methods for indicating a tire pressure condition are disclosed. Some systems (200; 300; 730) and methods include receiving, by a control unit (30) comprising a processor (220; 312) and a tangible, non-transitory memory (314), a tire pressure dat...

The device has a transmitter for transmitting a signal to a vehicle-installed device based on air pressure measured by a sensor. The device determines if the air pressure of the tire is abnormal and a recording section records abnormality data in the press...