Why Is My ABS and Traction Control Light On?: 1 Minute to Understanding Your Dashboard Alerts

When both your ABS (Anti-lock Braking System) and traction control lights come on, it’s a signal from your car’s onboard computer that something isn’t functioning as it should. The ABS ensures your brakes don’t lock up during sudden stops, while the traction control system helps prevent wheel spin during acceleration. If either system detects a problem, it will trigger a dashboard warning light; if both lights appear, their issues are likely interconnected. Common causes include a faulty wheel speed sensor, a bad ABS module, low brake fluid, or damaged wiring. Driving with these lights on can be risky, as your car may not handle optimally in slippery or emergency situations.

From a designer's perspective, I always approach anomalies with a diagnostic mindset, similar to refining a space based on observed flaws. If I discovered repeated functional issues with an interior feature—say, underperforming lighting—I’d look at source connections, sensor placements, and feedback loops. Likewise, when diagnosing vehicle dashboard warnings, proper step-by-step troubleshooting ensures safety and reliability. This systematic thinking also applies to optimizing home spaces for function and aesthetics. For example, when planning a room’s layout for flow and balance, a tool like a room planner can help you visualize potential problem areas before committing—just as early detection helps prevent automotive issues from escalating.

Tips 1:

If both your ABS and traction control lights come on, first check your brake fluid level and look for obvious wiring issues around your wheels. If the warning persists after topping off fluids and ruling out visible damages, consult a qualified mechanic for a diagnostic scan. It’s best to address these concerns quickly to secure maximum safety and prevent further costly repairs.

FAQ

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

A: It’s best to avoid extended driving. You may lose advanced braking and stability features, particularly in slippery conditions.

Q: What is the most common cause for both lights to be on?

A: A faulty wheel speed sensor is the most frequent culprit since both systems rely on it for data.

Q: Can I fix this problem myself?

A: Simple causes—like low brake fluid—can be DIY fixes. But electrical or sensor problems generally require professional diagnostics.

Q: Will disconnecting the battery reset the lights?

A: Sometimes, but this only clears the symptom—not the underlying problem. The lights often return until repairs are made.

Q: Does extreme weather affect ABS or traction control sensors?

A: Yes. Road salt, mud, and moisture can cause sensor issues or wiring corrosion, triggering warning lights.