Tesla ‘Full Self-Driving’ Faces Probe After Pedestrian Death (2)

The US opened a federal investigation into whether Tesla Inc.’s partial-automation system marketed as Full Self-Driving is defective after multiple crashes, one of which resulted in a fatality.

The National Highway Traffic Safety Administration said Friday it will assess whether Tesla’s system, also known as FSD, has the ability to detect and appropriately respond to fog and other reduced visibility conditions. The agency said four crashes have been reported in such scenarios where FSD was engaged.

In one of the crashes, a Tesla Model Y sport utility vehicle fatally struck a pedestrian. Another collision involving a Model 3 sedan ...