If the brake warning light comes on when you apply the brakes, it means that hydraulic pressure has been lost due to a leak somewhere in the brake system.+ u! O& `0 Z+ k3 @9 _6 \ g" n4 q9 c
If the brake light stays on, that means the sensor is faulty.
I thought the question was about the ABS light on? Unless the brake warning light has anything to do with the ABS light... + l* D2 \/ R/ `5 U4 b' Z: ]1 Q + z1 g8 T) S' X' {0 W9 dI am having the same problem with my car which I just discovered last night after I picked up my car from CDN Tire for the tire change. I sent it back to them for a checkup and they just called me that it was not caused by the tire change. (Note that both my ABS and Traction Control lights are on and I hear that clunking noise from the brake when starting my car). I will see what they find after they notified me that they'd charge me inspection fee.