For AT models

This light flashes if the vehicle is driven with tires of different diameters fitted on its wheels or with the air pressure excessively low in any of its tires.

    See also:

    When the following messages are displayed
    If one of the following messages is displayed while operating the CD player, determine the cause based on the following information. If you cannot clear those messages, please contact your SUBARU ...

    Tire pressure monitoring system (TPMS) (U.S.-spec. models)
    Turbo models Non-turbo models The tire pressure monitoring system provides the driver with a warning message by sending a signal from a sensor that is installed in each wheel when tire pressure is s ...

    Types of tires
    You should be familiar with type of tires present on your vehicle. ...