I know it was posted....please let me know

http://www.scionlife.com/tech/electrical_reset_maintenance_light.php

Reset Maintenance Required Light
Contributed by eric m.

After you've driven your Scion for a few thousand miles, you will see a "maintenance required" orange light flash for a few seconds in the center display console every time you start your car. Do not be alarmed. this is just a reminder to have your oil changed. If you change your own oil, you can reset the light. here is how:

1. Turn on the ignition and make sure it is on your odometer display, not the trip display.
2. Turn off your ignition. Hold down the trip meter reset button and turn the ignition on. Keep the button pushed in.
3. The maintenance required light will flash for a few seconds. when it turns off, let go of the reset button.

The the display will change for 1 second and go back to the mileage. That's it.

Worked for me, it'll work for you :D

thanks miko, i should have asked you first :)