I have a 2003 sc430
Vsc, light and brake light ON. Brake pedal goes to floor. Was driving brake light came on.
Vsc light was always on had no problem, until brake light on. No brake pressure.
I would check for brake fluid in the resivour. There could be a major leak so I would not recommend driving it anywhere, and probly should be towed to your mechanic so it can be properly diagnosed.
It may need new lines and to be bled. make sure like michael said you have it towed to your mechanic. this can be major. get it diagnosed asap.
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