My car made this long loud beeping noise today (and not the kind of beep when it does not sense the key, this was a long loud one) and the only light that was on was this exclamation point thing that looked like it was in a cup.... l do not know what that means or what the problem is but does anyone know what that symbol means?? It is on the top left corner of the dash where the speed and gas tank info are

Your coffee cup is empty.

sounds like water temp/level indicator. Check the coolant.

My husband has one. He says that it is a low air pressure sensor. If you need more info go online to g35driver.com - he is a big wig on that site and all the g35 drivers talk about their cars.

hope this helps!

That is your tire pressure monitor. That icon will light up if any of your tires goes below 28 PS l (at least that was the threshold on 04 coupes). Make sure none of your tires are flat or punctured. If not than just fill your tires to the recommended PS l in your owner is manual and drive the car for a short while above 25MPH. That will reset the TPM light.
That light comes on for me every Spring when l pull it out of the garage for the first time