Tesla issued a software update to its FSD system this week but has not yet responded publicly to the investigation.

The U.S. auto safety regulators have launched an investigation into nearly 2.9 million Tesla vehicles equipped with the company’s Full Self-Driving (FSD) software, following dozens of reports of traffic violations and crashes linked to the system.

The National Highway Traffic Safety Administration (NHTSA) said it has received 58 reports, including 14 crashes and 23 injuries, involving Teslas allegedly running red lights or driving against traffic when using FSD.

CBI News notes that the agency warned that the system—designed to assist, not replace, human drivers—has sometimes “induced vehicle behaviour that violated traffic safety laws.”

Tesla issued a software update to its FSD system this week but has not yet responded publicly to the investigation. The probe, described as a preliminary evaluation, is the first step before NHTSA could request a recall if it determines the vehicles pose an unreasonable safety risk.

In one complaint, a Houston driver told regulators that FSD “is not recognising traffic signals,” causing their vehicle to run red lights and stop at greens. Tesla reportedly observed the issue firsthand during a test drive but took no corrective action, according to the report.

The latest inquiry adds to mounting scrutiny of Tesla’s driver-assistance features, including previous investigations into remote car-movement crashes and the company’s robotaxi deployment in Austin, Texas.

Tesla maintains that FSD can “drive you almost anywhere with your active supervision” but stresses it does not make vehicles fully autonomous. Industry experts say the U.S. probe could have global implications. Tesla’s shares fell 2.1% in early trading after news of the investigation broke.