DETROIT (AP) — 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 road.
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The National Highway Traffic Safety Administration says in documents posted on its website Friday that it has concerns about the December recall of more than 2 million vehicles.
The agency pushed the company to do the recall after a two-year investigation into Autopilot’s driver monitoring system, which measures torque on the steering wheel from a driver’s hands.
The fix involves an online software update to increase warnings to drivers. But the agency said in documents that it has found evidence of crashes after the fix, and that Tesla added updates that weren’t part of the recall.
“This investigation will consider why these updates were not part of the recall or otherwise determined to remedy a defect that poses an unreasonable safety risk,” the agency wrote.
A message was left early Friday seeking comment from Tesla.
NHTSA said that Tesla reported 20 crashes that apparently happened after the recall remedy was sent out. The agency has required Tesla and other automakers to report crashes involving partially and fully automated driving systems.
The agency said it will evaluate the recall, including the “prominence and scope” of Autopilot’s controls to address misuse, confusion and use in environments that the system is not designed to handle.
It also said that Tesla has stated that owners can decide whether they want to opt in to parts of the recall remedy, and that it allows drivers to reverse parts of it.
The Associated Press reported shortly after the recall that experts said it relied on technology that may not work.