Skip the auto shop - Our mechanics make house calls

Q: Why is my brake warning light on sometimes?

asked by on

My brake warning light comes on every now and then while driving and also after it sits in park for about a minute or two. I'd say that 75% of the time driving, the light is off though. The brake fluid is full, didn't have to add any either. Seems like it goes off most of the time when I have to take a sharp corner or sitting at a stop light/sign or hit a bump (doesn't matter what size bump).
My car has an automatic transmission.

A: Hello. A brake warning light can come on fo...

Hello. A brake warning light can come on for many reasons. If it is coming on and off intermittently, then it may be possible that the issue is electrical in nature. The brake switch is wired to both the fluid level sensor, as well as the parking brake sensor. If there is an issue with either of the sensors, or with the wiring that goes to them they may cause the brake light to come on. As the issue only appears to occur when during sudden or sharp movements it may be possible that the issue is due to a loose wire or connector. I would carefully inspect the wiring to the fluid level and parking brake sensors for any damage or wear. If the wiring checks out I would move on to looking at the sensors themselves. If you would like an expert to come take a look at this in person, a certified pro from YourMechanic can diagnose the brake light and follow through with repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Issues with coolant pouring out of the overflow

Hi there. If the engine is losing coolant, then the location of the leak needs to be found first. A leak will allow the coolant to get low enough to cause it to overheat. I start by doing a pressure...

Q: Brakes and Pads

Hello there, thank you for asking about your 2008 Mercedes-Benz CLK350. You can get a quote for brake pads replacement on YourMechanic's website. The quote will be generated based on your car's make, model, and year. If YourMechanic does not...

Q: Wont start and battery is new. Is a push button car and the brake paddle is stiff

You should check to see if the brake lights are working? Your Kia Sportage may be under recall for an issue with the brake light switch. If the brake light switch is bad then the push button will not work...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.