Reporting a potentially dangerous situation related to the vehicle's braking system. This incident happened on [[redacted]], on [[redacted]] in around the Fife WA area. The vehicle is an 2021 Audi Q5 hybrid, purchased new and been taking to dealership for service for every service interval. Initially, the vehicle was in adaptive cruise control, speed set at about 60 miles per hour. Then when the vehicle comes to a congested section of the freeway, the adaptive cruise control tries to slow down the vehicle,...
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but it is about getting close to the vehicle in front, so I manually pressed on the brake and add additional brake force to make sure the vehicle stop in time. About that moment, there were multiple messages showed on the instrument panel, I did not have time to read all of them, but for sure one of the messages said braking system malfunction, and plus the icon with the vehicle and some curve line show up. After I came to a complete stop, and all the message disappeared, (I think the at that time, the vehicle icon with curve line still on), I begin to accelerate again, but then I noticed the brake is not functioning properly. The brake was very tight, I was only going maybe 15 miles per hour at the time and still have hard time stopping. If I would have accelerated to a higher speed, I may not be able to bring the vehicle to a stop safely then. On a busy freeway, I turned on my hazard light, and I drove slowly and safely try to move to an area on the freeway where I can slowly roll the vehicle to a complete stop and I have to push the brake very hard to do so. I reset my vehicle couple of times. Then the brake appears to be working again. But the check engine light came on. Since the braking system is working again at that time, I continue my drive home. After I arrived home, I restarted my vehicle again, and the check engine light disappeared. But please investigate this situation as the safety of the drivers and others are at risk INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)