"Brake" light came on for 1998 lexus es300 help?

[allengong]

i went to get it for a quick check in auto repair shop, they said the brake is good, and the fluid level is enough, but the light is still on, the mechanic said it could be the brake fluid level sensor problem

how likely can it be the sensor problem?

is there any other factors?

[ScottW]

Well if the brakes are good and the pedal is hard and not pushing to the floor like a leak then it must be the sensor.