Q: Check Brake system alert while driving.

asked by on

As the weather has warmed, a check brake system alert has been popping up frequently while driving. When a system check is done, it says brake system ok. When the message appears, the air conditioner also stops blowing cold. The fuses for the ABS module are good, the battery was tested and it was on "its last quarter of life". I read a forum that said it was probably the battery or alternator. I don't want to spend a bunch of money diagnosing, rather fixing.

My car has 104000 miles.
My car has an automatic transmission.

If your battery or charging system is low or not charging, then it could affect systems that require a minimum amount of voltage. This will trigger a failure light or stop working if the voltage falls below the set voltage. I recommend having a mechanic check your battery, if you have them repair it then the diagnostic fee may be waived.

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. Check Brake system alert while driving.

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: I have a 2008 f150 it won't drive over 15 miles. And it shake. Changed the coil pads and spark plugs already. Still won't pick up

It sounds like your vehicle may be a bit low on transmission fluid or you may potentially have a bad transmission control solenoid. As you know, the transmission works on hydraulic pressure built up from the fluid inside and uses...

Q: Q: The abs light will not go off

If the ABS warning light has come on, the recommended service is an ABS fault diagnostic. Inasmuch as the warning light is on, if you request that diagnostic, the responding certified mechanic will download the ABS trouble codes that your...

Q: My 2001 ford expedition has been shaking over 65 mph ive changed the ball joints inner and outer ties rod ends brakes and rotor hu

The shocks may be worn out and when you get to the higher speeds there is a normal tire vibration from road surface and the shocks should keep the tires in contact with the road. Have shocks replaced if they...

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...