Sounds like tire pressure light or perhaps check engine light.
it is the tire pressure light. just check your tires
Low tire pressure
That indicator light is a low tire pressure light. It is activated when one of your tires are low.
Looking for a Used tC in your area?CarGurus has 4,739 nationwide tC listings starting at $4,250.
Search Scion tC Questions
Scion tC Experts