The handbrake indicator light on my 2005 Scion tC intermittently turns on while I'm driving.
I've read about two causes: low brake fluid and (not likely) the handbrake is somehow getting lifted while driving.
Reason I say the second cause is unlikely is because the handbrake light does not turn on until I lift the handbrake far enough for the first click, and you have to lift it pretty far up for just that first click. While driving, the handbrake is completely down.
As far as my brake fluid being low, I'm not convinced. Obviously, I can't check the fluid while I'm driving and pressing the brake pedal, but while the car is stopped, the brake fluid levels are in the normal range. I replaced my front brake pads two months ago and my rear brake pads just last week.
Could there be any other reasons for the handbrake indicator light turning on while I'm driving?