The US government said approximately 2.9 million cars could be impacted by the investigation.

The National Highway Traffic Safety Administration said is opening an investigation into 2.88 million Tesla vehicles equipped with the Full Self-Driving system.

Tesla is the subject of yet another investigation.

The US government said approximately 2.9 million cars could be impacted by the investigation.

For years, Tesla CEO Elon Musk has promised investors that Tesla would someday be able to turn their existing electric vehicles into robotaxis.

The new investigation covers 2.9 million vehicles.