hey guys..i was driving my car today and all of a sudden the yellow light came on next to the coolant....don't know what it's called but it's in the row of check lights....4wabs light which is all the way on the left but the yellow light on the right is coming on....any idea what it could be? my car is driving fine though..my brake light came on but i added more brake fluid and it was gone but what is this yellow one? is there anything i can check real quick? help guys...i hope it's nothing too serious

 

Ummm .... your check engine light?