NHTSA Complaint #11595171 — 2019 HONDA CR-V

I was driving from Los Angeles to Las Vegas on [XXX] with moderate traffic, going approximately 70 mph. I was traveling in the #1 (left most) lane. I had been using Adaptive Cruise Control (ACC) for several hours without any problems. ACC started behaving differently: instead of automatically applying the brakes when the vehicle in front slowed down, I had to press the break peddle manually. This happed twice before the car suddenly, unexpectedly, applied full braking force. I had to take emergency action to avoid being hit by the vehicle behind me and quickly move onto the left shoulder. My vehicle completed its stop on the shoulder. A message flashed on the instrument panel (I believe it was related to the brakes), I was too busy getting off the road to read it. After the vehicle stopped, the brakes released, and I was again able to drive. I turned off ACC and re-entered the freeway (with some difficulty, as traffic was moving very fast). We continued our journey to our destination without cruise control activated. There were no further problems. I took my vehicle into the dealer when I returned from our trip. They inspected it and checked for codes. There were no codes. They did a short test drive and had no problems. The said vehicle needed software updates and did them. Updated EBB, EVPS, and updated ACC/CMBS and PGM F/I software. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)