When the "check gauges" light comes on it means that your car's computer has noticed that something may be wrong. Usually it is relating to the oil pressure or temperature, coolant temperature, or even that your gas is low. You should look for lights relating to these problems on your dash that don't usually come on. If you can't tell, then take your car to a shop that has computer diagnostic equipment and have them check it out. It will most likely be something simple, but if ignored can lead to engine damage or terrible gas mileage.