I have a warning light on that is a circle with 2 half circles on the outside what does this mean?

Its probably a brake warning light. The symbol would be an exclamation mark between two half circles which resemble brake shoes.
Check your owners manual for details.

brake fluid is low

you lucky person,you have fitted at factory, a speed warning buzzer,which you can set yourself, to give you a warning that you are exceeding the limit(you set)NOW, i cannot, for the life of me, remember how to set it, but it is in the handbook.

Brake ware warning light.
Brake pads have sensors , when pads worn out to the point when it needs to be replaced , sensor gets cut by brake disc and light goes on.

It's the "abs" light. To find out why it's on you need to take it to your mechanic and let him run a diagnostics test on it. Alot lot of the times it's just a faulty sensor that causes it to come on, but better safe than sorry.

IT COULD BE A BRAKE PAD LOW WARNING LIGHT

Brake pads check light.

worn brake pads or broken abs sensor

Check ther coolant level, if this is ok, its possible the sensor on the coolant resevoir faulty. the other warning light sounds like the brake pad warning light. is the warning yellow?

i have a 1999 323 the light that is on is a circle with 3 blocks on each side what does it mean?