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Check the brake fluid level in the reservoir there is a sensor there that will make the light come on if your level is low.
I have noticed that if the brake fluid is low enough in the brake fluid master cylinder it will cause the light to come on when turning left. before it comes on for a low fluid problem because of the fluid shifting.
Have you checked to make sure your brakes do not need replacing? Also, check your brake fluid. Low fluid can cause that light to appear as well.
Depends on the make of car, but most likely you are low on brake fluid. Check it before driving.
A drop in brake fluid pressure (caused by, say a leak or crack)
The red brake light indicates that the parking brake is on or that the brake fluid is low. Be sure to add the specified brake fluid if you add fluid. Also make sure that you don't allow any dirt to get into the brake fluid and don't overfill the brake fluid either.
Could be low brake fluid. Emergency brake could be partly on-make sure it is pulled completely in the up position.
If you look below your brake reservoir there is a sensor that detects if your brake fluid is low. If this sensor goes bad or sticks, it will make the brake light come on. Try unplugging this connector. Your light should go off. If you are not having to add fluid periodically to the system, I would replace the sensor. If you are having to add any fluid to the system, then you probably have a leak in a brake line or at one of your calipers. Also be sure the emergency brake is fully released.
Check your Brake fluid. If the fluid is low then will make the Brake light go on. anothe thing is you might be needing new brakes soon..
Typically, worn brake pads won't cause the warning light to come on. Some vehicles have a brake fluid sensor that can cause the light to come on. Also make sure the parking brake is completely releasing and if you have ABS, make sure everything is working there. Uneven brake pressure will certainly cause the brake light to come on, that's when the master cylinder is working a lot harder for one circuit (front or back) than it is for the other, indicating either low brake fluid level or damaged/worn wheel cylinders. If you can't find anything by examining the brakes, you may need to pay for a scan of the ABS computer.
Check brake fluid level in master cylinder Make sure parking brake is released Check to see that parking brake switch has not come loose from its mounting bracket
Check Brake fluid level in master cylinder and make sure Emergency brake is fully released