ABS, Smart brake support and tire pressure lights turning on and off?

KABAKER1784

MEMBER
2018 MAZDA 3
2WD
90,000 MILES

Good morning, I have been having some warning lights coming on and off for the past week. It's the ABS, Smart brake support, and tire pressure lights. Nothing had happened, previous work done etc, prior to. I have been hearing what sounds like a scratching or something under my car, not sure if it's the brakes.

I've had the car for less than 2 years and have had no problems, but I had to replace a battery.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,909 POSTS

Hello,

So, what can happen is one of the ABS wheel sensor wires can get ripped out because of road debris. You will need to raise the car up by following this guide for inspection. While the tires are off of the ground roll each tire over to listen for the noise this can help is see which tire is having an issue.

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

We can also run the codes to see which ones are stored, telling us what the problem should be.

This guide can help:

https://www.2carpros.com/articles/anti-lock-system-testing-and-repair-abs

Here are the locations of the wheel speed sensors for the front and rear so you can see what you are looking for and how to replace them. Check out the images (below). Please upload pictures or videos in your response to the problem so we can see what's going on.

Images (Click to make bigger)