Why Are My ABS and Brake Lights On?: 1 Minute to Troubleshoot Your Vehicle's Warning Lights

If both your ABS (Anti-lock Braking System) and brake lights are illuminated on your dashboard, it’s a clear signal that your vehicle’s braking system may have a fault that requires attention. The ABS light typically indicates a problem within the anti-lock system, such as a malfunctioning sensor or a wiring issue. When paired with the brake light—which usually points to low brake fluid, worn brake pads, or a general brake system fault—it strongly suggests that the issue could be affecting both systems.

Some common causes include:

1. Low brake fluid. If the fluid level drops below a safe threshold, both lights can come on to warn you of compromised braking performance.
2. Damaged wheel speed sensor. These sensors detect wheel rotation, and if one fails, the ABS system cannot function properly.
3. Faulty ABS module. The module controls how the system responds—failure can affect brake warning signals.
4. Wiring or fuse problems. Electrical issues in your car’s system can trigger both lights simultaneously.

If you notice both lights, your car still likely has basic braking ability, but without ABS enhancement. However, driving in this condition is risky, and you should have the system inspected by a professional as soon as possible. As a designer, I often compare a car’s safety systems to the way a well-planned home combines both function and security. Just as a thoughtfully arranged space uses smart design elements—such as a home designer tool—to enhance safety and functionality, your car’s braking system relies on the integration of multiple components to protect you on the road.

Tips 1:

Don’t ignore warning lights—schedule a brake system inspection promptly. Also, check your car’s brake fluid level yourself; a quick look under the hood could reveal a simple fix. Consider keeping your vehicle’s service records organized—much like maintaining a well-designed space, it helps you track important details and avoid future issues.

FAQ

Q: Why is my ABS light on?

A: The ABS light usually means there’s an issue with the anti-lock braking system, such as a faulty sensor, wiring problem, or malfunctioning module.

Q: Is it safe to drive with the ABS and brake lights on?

A: It’s possible to drive short distances, but you should seek professional help immediately, as braking efficiency may be compromised.

Q: Can low brake fluid cause both lights to come on?

A: Yes, low brake fluid is a common reason for both the ABS and brake warning lights to activate.

Q: How do I check my brake fluid level?

A: Locate the brake fluid reservoir under your vehicle’s hood, ensure it’s between the min and max marks, and top up if needed using the recommended fluid.

Q: What should I do first when both lights appear?

A: Pull over safely, consult your vehicle’s manual, check the brake fluid level, and contact a qualified technician right away.