Q: The ABS & Brake light come on randomly. It is not because of low brake fluid or a bad sensor.

asked by on

I’ve got a 2012 Sonic Manual, and the ABS & Brake Lights will randomly and frequently light up, accompanied by what is becoming a very annoying alarm.

I’m told this usually means that the brake fluid levels are low, but in this instance they are not. The next diagnosis appears to be a bad brake level sensor. But in this instance, it is not. The dealership replaced the sensor back in September, and then I took it to a local mechanic earlier this month—who did the same thing—and today when I brought it back to the (same) dealership they informed me that my brake levels are good, so it must be my brake level sensor, and they asked me if I wanted to have the part ordered.

Taking ANY other suggestions. The dealership also missed a faulty coolant sensor which caused the car not to start—very inconvenient. That was replaced in February.

(I know how this sounds, but if there are any suggestions or tips on just removing the alarm, that would be great too.)
My car has a manual transmission.

Hello. Typically diagnosing a random problem like this where the warning lights come on and off can confuse a lot of mechanics who firmly believe that a component or part must be damaged to cause a light. However, in most cases, the error code that triggers the warning light in the first place is due to a bad electrical connection. I would start your diagnosis by checking the connections to each ABS sensor and ABS module to see if the electrical harness is damaged, corroded or simply loose. Beyond that, the only other advice I would suggest is to have a professional mechanic download the stored error codes to see if that helps trace the issue.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. The ABS & Brake light come on randomly. It is not because of low brake fluid or a bad sensor.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Bcm replacement

If you are certain that the BCM has failed and you intend to get one from the junkyard anyway, I would recommend simply giving it a try. If it works, problem solved. If it does not work, it is very...

Q: Q: How do I read the odometer?

The odometer is located on the instrument panel, and displays how many miles your vehicle has traveled. The purpose of this feature is tell you the total miles your car has driven, so the odometer cannot be reset.

Q: I have to fill gas tank everyday due to car using alot of fuel

Hi there. There are dozens of problems that can lead to a drop in gas mileage, some of them are serious and some can be easily corrected. Here are some of the more common issues that can affect the fuel...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...