The US Department of Transportation has launched an investigation into more than 2 million Tesla vehicles equipped with its driver-assistance system, citing possible malfunctions in low visibility conditions.
The National Highway Traffic Safety Administration announced that the probe was opened on Thursday.
The preliminary review will cover a total of about 2.41 million vehicles of five models with the Full Self-Driving software. They include the 2023-2024 Cybertruck and 2017-2024 Model 3.
Department officials say they received reports of four crashes that occurred in reduced roadway visibility conditions, such as sun glare and fog. One of the crashes was fatal.
They say the review will assess whether the Tesla system can operate safely under poor visibility conditions.
The US electric-car maker has revealed a plan to use the system for commercialization of a fully autonomous taxi — without human monitoring. But the investigation results could put the brakes on the idea.