displaying smart brake malfunction?

2020 MAZDA CX-9

145,000 MILES

MATTIE154

MEMBER
1 POST
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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!!

Aug 1, 2025 at 3:47 PM

STRAILER

✓ASE Certified Mechanic
54,497 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.

Aug 2, 2025 at 10:10 AM

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

Images (Click to enlarge)

Aug 2, 2025 at 10:29 AM

STRAILER

✓ASE Certified Mechanic
54,497 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

Check out the images (below). Please upload pictures or videos in your response

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Aug 2, 2025 at 11:07 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.