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 ( ...

Horn
Horn To sound the horn, push the horn pad. ...

If steam is coming from the engine compartment
Turn off the engine and get everyone away from the vehicle until it cools down. ...