The agency also found that Tesla’s Autopilot can discourage drivers from taking manual control of the vehicle compared to other automated driving systems because doing so deactivates Autosteer lane-centering assistance.

The U.S. government’s auto safety agency is investigating whether last year’s recall of Tesla’s Autopilot driving system did enough to make sure drivers pay attention to the

The new probe comes as the NHTSA ends its nearly three-year investigation into Autopilot, which included an analysis of 956 crashes. In 467 of those incidents, the ODI determined that Tesla’s software didn’t sufficiently require driver’s attention, even as it made drivers more confident.

The NHTSA called on the company to make the recall after a two-year investigation into the sufficiency of Tesla’s Autopilot’s driver monitoring system, which measures torque on the steering wheel from a driver’s hands and sends an alert if drivers fails to do so.

On Tuesday, the electric car maker posted its quarterly results showing precipitous falls in sales and profitability. Today, we've learned that the National Highway Traffic Safety Administration is concerned that Tesla's massive recall to fix its Autopilot driver assist—which was pushed out to more than 2 million cars last December—has not actually made the system that much safer.

The top US auto-safety regulator is again investigating Tesla Inc.’s Autopilot, this time over whether a fix deployed months ago did enough to stop people from misusing the system.The National Highway Traffic Safety Administration disclosed Friday that it’s opened a query into the Autopilot recall Tesla conducted in December.

The National Highway Safety Administration said it had concerns about how Tesla handled the recall based on recent crashes and testing of cars that had been updated.

The National Highway Traffic Safety Administration is investigating whether last year's recall of Tesla's Autopilot driving system​ did enough to make sure drivers pay attention to the road.

The National Highway Traffic Safety Administration said it has concerns about changes Tesla made to the driver assistance system as part of a December recall.

The National Highway Traffic Safety Administration is looking into whether Tesla did enough to fix issues with its Autopilot technology in response to a mass recall late last year after multiple crashes involving the assisted-driving system.