Tire light - 2015 Subaru Forester

Tires are good, and pressure is good, but tire light start to blink for a while then stays on for awhile. Then it will go off. Please help

Subaru uses a sensor inside the tire to measure pressure and send that data wirelessly to the car. If the batteries are getting a little weak in one of them, it may take longer to register. Your local tire store can check the signal and replace it if needed.

Can be out of battery for your tpms sensor, but the design life is 10 years.
To save money,Buy a tire pressure monitor for only $30, a Tpms sensor cost 60 for only one wheel

Check the spare tire