I start the car and the abs light goes off, then driving along the brake light and abs light comes on for no reason.

Hello Pamela

All questions in this category need 'year make model'. This is what Lexus say! You need to get the vehicle on a scan tool to diagnose the fault.

If both the ABS and the brake system light come on at the same time, your vehicle is no longer safe to drive. This means there is a serious problem with the car's braking system and continuing to drive puts yourself and others at risk.

What do the ABS and Brake System Light Mean - Earnhardt ...

https://www.earnhardtlexus.com > what-do-the-abs-and-br...

9 Things to Check When Your ABS and Brake Light Are On

https://holsteinparts.com > ABS Sensor
On most vehicles, only the ABS light will illuminate when a fault is detected. What if your car or truck has both the ABS & BRAKE lights illuminated?
‎3 Reasons an ABS Light Turns... · ‎ABS Light On - How to Test it

When I had that problem with the emergency light it was the sensor for emergency brake
The abs and brakes sounds like you are loosing pressure in the system

The service ABS light on while driving means that the ABS wheel speed sensor is defective or a broken wire that goes to the sensor. You now only have regular braking. This means that you can now lock up one or more wheels with hard braking. Then the car can swerve either left or right while braking hard. The traction control must also rely on the ABS wheel speed sensor to keep both front wheels spinning at the same speed for safety reasons. This prevents loss of control of your car while getting better traction with the tires.

Check to see if your emergency brake is partially on. Also the abs light goes on when the sensors on the hubs get corroded from salt. They either need to be cleaned or replaced. Mine are on from corrosion from road salt so rather than pay the hefty fee to fix the issue until I can do it myself I just pulled the fuse for ABS in my panel to shut that system off. Perfectly safe to drive without them and not an inspection requirement. Now your abs is probably going on every time you apply the brakes and that is not a good thing!

On vehicles equipped with antilock brakes (ABS), a second warning light is provided to warn if a problem occurs within the ABS system. The ABS lamp comes on when the ignition is turned on for a bulb check, then goes out after the engine starts. If the ABS warning light remains on or comes on while driving, it indicates a fault has occurred in the ABS system.

What happens next depends on the nature of the fault. On most applications, the ABS system disables itself if the ABS warning light comes on and remains on.

Could be many reasons. May be a sensor in the brake system. A garage will have the code readers and will check it. As it's a safety item I would recommend that you refer to a garage right away. The scope of the question us too large to answer with any certainty on here

If there is ABS on the car it is the ABS detecting the difference inthe wheel RPM that is triggering off the brake light.
so not to worry as this happens and specially if your brake fluids are full.
The other reason is the momentum is setting off the brake fluid sensor to switch on .

You have to check you brakes yourself or take it to the shop, I had a brake light on and once I change the rotors and brake pads the brake light went off.





Melvin

St Louis

remove cluster and check wires for a short