Q: My car needs a brake sensor or brake fluid.

asked by on

Brake light comes on intermittently. As per investigation online, it could be the brake fluid or it needs a new brake sensor.

There are only three things that can trigger a brake light on most vehicles and four if you own a BMW. The brake light can be triggered by either low brake fluid, dysfunctional parking brake engagement (or issue with the parking brake switch), or if the pressure differential switch has noticed a pressure differential between the two sides of your split brake system. BMW vehicles have a brake pad sensor which will also trigger the brake light when the pads get too thin. I would recommend having your vehicle inspected for brake issues. The most common causes for the red brake light would be low brake fluid and issues with the parking brake switch.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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!
  1. Home
  2. Questions
  3. My car needs a brake sensor or brake fluid.

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: Brake fluid level keeps going down

Hi there. Your vehicle is experiencing a leak. Whether it is in the brake master cylinder (not visual) or an external leak by the wheels can be determined only in person. It is also possible that shop did not bleed...

Q: The steering wheel stopped working suddenly.

Hi there. On your 2008 Lexus, a malfunctioning steering wheel can be caused by several different individual components, ranging from steering column failure, to electric power steering motors and sensors not working correctly. The best way to determine what is...

Q: Truck doesn't like to go into gear while driving

Based on your description, I think one of two things is happening. Either your transmission fluid level is low causing the slipping or there is an internal transmission issue. I would start by checking the fluid level of your transmission....

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.