* Low Brake Fluid: This is the most frequent cause. The low fluid level is often sensed by a sensor in the master cylinder, triggering the warning light. Check your brake fluid reservoir (usually a clear plastic container near the engine). If it's low, you need to find and fix the leak immediately before driving. Do not simply add fluid without determining the cause of the leak.
* Brake System Malfunction: The light can illuminate due to a variety of issues within the braking system itself, including:
* Worn brake pads: Sensors embedded in the brake pads alert the system when they're nearing the end of their lifespan.
* Faulty brake caliper: A sticking or seized caliper can cause uneven brake pad wear and trigger the light.
* Brake line leak: A leak in any part of the brake lines will lead to low brake fluid and activate the light.
* ABS (Anti-lock Braking System) or other sensor problems: A malfunction in the ABS system or other sensors related to braking (wheel speed sensors, for example) can also turn on the brake light.
* Master cylinder failure: A failing master cylinder is a serious problem that requires immediate attention.
* Parking Brake Engaged: A simple but important check - make sure your parking brake (emergency brake) is fully released.
* Faulty Brake Light Switch: This switch detects when the brake pedal is pressed and activates the brake lights. A faulty switch may not register the brake pedal correctly, causing the light to stay on.
What to do:
1. Check the brake fluid level: This is the first and easiest step.
2. Check the parking brake: Make sure it's fully released.
3. Have it professionally diagnosed: If the brake fluid is low or you're unsure about any other potential causes, do not drive the vehicle. Take it to a qualified mechanic or Ford dealership for a proper diagnosis and repair. Driving with a brake system problem is extremely dangerous.
Ignoring a brake light is risky. It could indicate a serious problem that could lead to brake failure. It's always best to get it checked out promptly by a professional.
