Why Are My ABS and Traction Control Lights On at the Same Time?
April 30, 2026
Seeing the ABS light and traction control light come on together can make it feel like the car suddenly developed two separate problems at once. In many cases, the situation is more connected than that. Those systems work closely together, and both depend on the same wheel-speed and braking information to do their job.
That shared design is why one fault can trigger both warnings. The car may still drive fairly normally at first, which is exactly what makes drivers put it off longer than they should.
How ABS And Traction Control Work Together
ABS helps keep the wheels from locking during hard braking. Traction control helps reduce wheelspin when one tire loses grip during acceleration. Both systems rely on sensors at the wheels and steady communication with the brake and stability systems.
Once one part of that chain stops giving accurate information, the car may disable or limit both features. Regular braking may still feel normal, but the extra support those systems provide in the rain, on loose gravel, or during sudden stops may no longer be there.
The Most Common Cause Is A Wheel Speed Sensor Issue
One of the most common reasons both lights come on at the same time is a faulty wheel speed sensor. Each wheel has a sensor that tracks its rotation speed. If one sensor gives a weak reading, an erratic signal, or no signal at all, the system can no longer trust the data it needs.
The sensor itself is not always the only thing to blame. Wiring damage, corrosion, road debris, or buildup around the sensor area can cause the same problem. A proper inspection helps separate a bad sensor from the conditions around it.
Brake System Problems Can Trigger Both Lights Too
Low brake fluid, uneven hydraulic pressure, or a problem inside the ABS hydraulic unit can also turn on both lights. That is one reason these warnings should not be treated like simple electrical annoyances. A brake-related issue may be part of the picture, even if the pedal still feels acceptable during normal driving.
In some vehicles, worn brake components can also play a role if the system starts seeing behavior outside its normal range. The car is basically telling you that one part of its braking or stability network is no longer giving it the confidence to keep everything active.
Why The Car Can Still Feel Fine At First
A lot of drivers keep going because the vehicle still stops and turns well enough around town. That is common. The standard brakes still work in many ABS-related faults, so the problem can feel less serious than the dashboard makes it seem.
The difference shows up when road conditions get worse or the stop gets harder. Wet pavement, sudden braking, loose surfaces, and emergency lane changes are where ABS and traction control earn their keep. Losing that extra control may not feel dramatic during an easy commute, but it can make a real difference when grip disappears fast.
Wheel Bearing And Front-End Wear Can Add To The Problem
A worn wheel bearing, damaged tone ring, or loose front-end component can sometimes interfere with sensor readings, too. In that kind of situation, replacing the sensor alone will not solve the problem, because the sensor is responding to a mechanical issue nearby.
That is why these warning lights deserve a more thorough inspection rather than a quick parts guess. If the wheel-end hardware has excessive play or damage, the system may continue to report the wheel speed incorrectly, no matter how many times the code is cleared.
When You Should Stop Waiting And Get It Checked
If both lights are on and the car feels different under braking, pulls during stops, or shows a red brake warning, that should move to the top of the list. A clear change in braking feel is not something to push into next week. Even without those extra symptoms, both warnings together still mean the car has lost part of the safety backup it was designed to have.
That is where regular maintenance helps: brake fluid checks, wheel-end inspections, and early attention to smaller front-end problems can sometimes catch the issue before both systems shut down. Once the lights are on, diagnostics and a focused inspection are the better path.
What A Proper Inspection Should Include
A good check for this problem should include stored fault codes, live wheel-speed readings, brake fluid level, wiring condition, and the condition of the wheel-end parts. The goal is not only to turn off the lights. The goal is to determine why the systems stopped trusting the information they were receiving.
That kind of inspection keeps the repair more accurate and usually less frustrating. A minor sensor issue can cause a warning like this, but it can also be the first visible sign of a larger brake or wheel-end problem that should be addressed before it gets worse.
Get Brake And Stability System Service In Hawaii, With LexBrodies
If your ABS and traction control lights are on at the same time, LexBrodies can perform an inspection and diagnostic testing to determine whether the problem is caused by a wheel speed sensor, a brake system issue, a wiring fault, or a worn wheel-end component.
Visit one of our Hawaii locations before the warning becomes a more serious safety concern and leaves you without the control those systems are supposed to provide.
