The investigation into the summons feature likely comes as a blow to Tesla, which has been trying to advance its driverless capabilities lately. In a somewhat controversial move, Tesla's summons feature relies on a camera-only approach, as opposed to competitors using lidar, radar and cameras for driverless capabilities.

The agency has previously investigated earlier versions of Smart Summon, which is meant to let a Tesla vehicle park itself or fetch a driver via remote app command.

The National Highway Traffic Safety Administration's is focused on safety concerns related to the "Actually Smart Summon" (ASS) feature.

The National Highway Traffic Safety Administration has lunched an investigating into Tesla’s parking retrieval feature called “Actually Smart Summon”.

Dozens of videos reportedly show Tesla vehicles colliding with other cars, parking signs, and walls while using a driverless remote parking feature.

The National Highway Traffic Safety Administration is investigating 2.6 million Tesla vehicles over crashes involving the "Actually Smart Summon" feature. The feature lets users move cars remotely. The probe examines the feature's maximum speed,

The "Actually Smart Summon" (ASS) feature of Tesla cars is now under the close scrutiny of the Feds as it starts a probe into more than 2.6 million cars that make use of the technology following reports of crashes involving vehicles owned by the Elon Musk's firm.