The agency said it has reports of Tesla vehicles using FSD driving through red traffic lights and driving against the proper direction of travel during a lane change.
RECALL COULD FOLLOW IF NHTSA FINDS SAFETY RISKSIn total, NHTSA is reviewing 58 reports of issues involving traffic safety violations when using FSD, including 14 crashes and 23 injuries.
The new investigation comes amid growing scrutiny of Tesla’s advanced driver assistance system from Congress and weeks after a new NHTSA administrator was confirmed.
Tesla, which did not immediately respond to a request for comment, issued a software update to FSD this week.
NHTSA said it has six reports in which a Tesla vehicle, operating with FSD engaged, “approached an intersection with a red traffic signal, continued to travel into the intersection against the red light and was subsequently involved in a crash with other motor vehicles in the intersection.”
NHTSA said four crashes resulted in one or more injuries.
The investigation – a preliminary evaluation – is the first step before the agency could seek a recall of the vehicles if it believes they pose an unreasonable risk to safety.
Tesla shares fell 2.1% in early trading on the investigation first reported by Reuters.
A driver in Houston in 2024 told NHTSA that FSD “is not recognizing traffic signals. This results in the vehicle proceeding through red lights, and stopping at green lights.”
The complaint added: “Tesla doesn’t want to fix it, or even acknowledge the problem, even though they’ve done a test drive with me and seen the issue with their own eyes.”
NHTSA also said it will review FSD behavior when approaching railroad crossings. Last month, Democratic Senators Ed Markey and Richard Blumenthal cited a growing number of reported near-collisions in urging the agency to investigate.
Tesla’s FSD, which is more advanced than its Autopilot system, has been under investigation by NHTSA for a year.
In October 2024, the agency began an inquiry into 2.4 million Tesla vehicles equipped with FSD after four reported collisions in conditions of reduced roadway visibility, such as sun glare, fog or airborne dust, including a 2023 fatal crash.
Tesla says FSD “will drive you almost anywhere with your active supervision, requiring minimal intervention” but does not make the car self-driving.
Oliver Carsten, a professor of transport safety at the University of Leeds, said the NHTSA investigation into Tesla “should serve as a wake-up call for Europe. We are seeing an increasing number of systems on the market that blur the line between assistance and automation.”
Tesla’s other automated vehicle features have also drawn agency scrutiny.
In January, NHTSA opened an investigation into 2.6 million Tesla vehicles over reports of crashes involving a feature that lets users move their cars remotely.
NHTSA is also reviewing Tesla’s deployment of self-driving robotaxis in Austin, Texas, launched in June.
