See also:

Low tire pressure warning light (U.S.-spec. models)
When the ignition switch is turned to the “ON” position, the low tire pressure warning light will illuminate for approximately 2 seconds to check that the tire pressure monitoring system (TPMS) is f ...

Fuel
...

The Inside
The interior is quiet enough at idle that one time I didn't even realize it was running. That's when I recognized Subaru finally seems to have licked this engine's chronic idle vibration. In this ...