Displaying Smart brake malfunction?

Tiny
MATTIE154
  • MEMBER
  • 2020 MAZDA CX-9
  • 145,000 MILES
Well, I was driving on the interstate my cars dashboard started flickering and displaying smart brake malfunction cruise control malfunction cruise control disabled. The steering wheel locked and Car was jerking and slowed all the way down. Please help!
Friday, August 1st, 2025 AT 3:47 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Yep, the car is in "limp mode" so something has gone wrong in the system, it will need to have a CAN scan done to see what codes are stored so we can fix it, this video will show you how.

https://youtu.be/u-4syLc-ifQ

This must be done to see where to look for the problem. Please go over this guide and get back to us.

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Saturday, August 2nd, 2025 AT 10:10 AM
Tiny
MATTIE154
  • MEMBER
  • 1 POST
Thanks for getting back to me. I actually did take my car to o’Reilly auto parts and they did a test. I have attached below what the test showed. Thanks so much for being willing to help me because I have no idea. Lol
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Saturday, August 2nd, 2025 AT 10:29 AM
Tiny
KEN L
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  • 54,137 POSTS
Okay, the big code that stands out is the battery below threshold. So I would remove the battery and take it to the auto parts store for testing. Then I would clear the codes to see what happens. This guide will show you how with instructions below to help with your car.

https://www.2carpros.com/articles/how-to-replace-a-car-battery

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Saturday, August 2nd, 2025 AT 11:07 AM

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