WASHINGTON -- Tesla Inc. is recalling nearly 12,000 U.S. vehicles sold since 2017 because a communication error may cause a false forward-collision warning or unexpected activation of the automatic emergency braking system, the National Highway Traffic Safety Administration said Tuesday.
The California automaker said the recall of 11,704 Model S, X, 3 and Y vehicles was prompted after a software update on Oct. 23 to vehicles in its limited early access full self-driving (FSD) beta population.
The next morning, Tesla began receiving reports of false forward collision warnings and automatic emergency braking events from customers, which prompted an investigation by the company and a new software release to address the issue.
FSD is an advanced driver assistance system that handles some driving tasks but Tesla says does not make vehicles autonomous.
NHTSA said Tesla "uninstalled FSD 10.3 after receiving reports of inadvertent activation of the automatic emergency braking system" and then "updated the software and released FSD version 10.3.1 to those vehicles affected."
The agency said it "will continue its conversations with Tesla to ensure that any safety defect is promptly acknowledged and addressed."
The recall comes after NHTSA last month asked Tesla why it had not issued a recall to address software updates made to its Autopilot driver-assistance system to improve the vehicles' ability to detect emergency vehicles.
Tesla said the issue was prompted by a software communication disconnect between two onboard chips that prompted an issue that could produce "negative object velocity detections when other vehicles are present."
If the automatic emergency braking system unexpectedly activates while driving, it could raise the risk of a rear-end collision, Tesla said, but added it was not aware of any crashes or injuries related to the issue.
After the Oct. 24 reports, Tesla said canceled the FSD update on vehicles that had not installed it and disabled FCW and AEB on affected vehicles.
The same day, Tesla CEO Elon Musk tweeted of FSD: "Seeing some issues with 10.3, so rolling back to 10.2 temporarily. Please note, this is to be expected with beta software."