* Low Brake Fluid: This is the most common cause. The low fluid level activates a sensor that illuminates the light. Check your brake fluid reservoir (usually a clear plastic container with markings showing minimum and maximum levels). Low fluid indicates a leak somewhere in the brake system – a serious issue requiring immediate attention.
* Parking Brake Cable Malfunction: Even if you're *sure* the parking brake isn't engaged, a problem with the cable itself (sticking, broken, etc.) might be preventing it from fully releasing. This can send a false signal to the light.
* Brake Switch Problem: The brake light switch is a small component that detects when the brake pedal is depressed. If it's malfunctioning, it could be sending incorrect signals, including falsely indicating that the parking brake is on.
* Brake System Leak: As mentioned above, a brake fluid leak will not only lower the fluid level but can also cause problems with brake pressure and sensor readings, leading to the light staying on.
* Faulty Brake Pressure Sensor: This sensor monitors brake pressure. If it’s malfunctioning, it could give a false reading.
* Electrical Issue: There might be a short circuit or a problem with the wiring leading to the parking brake warning light.
What to do:
1. Check the brake fluid level immediately. If low, you likely have a leak and need professional help. Do not drive the car until this is addressed.
2. Inspect the parking brake. Make sure it's fully released. If there's resistance or it feels stuck, it's definitely a problem.
3. Consult your owner's manual: This will provide specifics about the location of the brake fluid reservoir and other components related to your vehicle's brake system.
If you're not comfortable checking these things yourself, take your Buick Regal to a qualified mechanic as soon as possible. Driving with a malfunctioning brake system is extremely dangerous.
