When I first start the car the coolant light comes on along with the common buzzing from the steering column... I topped it up and burped the system but it still does it from time to time...

BUT yesterday the buzzer comes on without the light.... I figured since there was no light maybe the oil was getting low because I did have a very slow leak from the oil lines. I topped it up and it did the samething today...

What does just a buzzer mean anyways. Am I right for assuming its a low oil level?

 

Low oil, Low coolant, too high RPMs