Tesla has issued a recall that automatically sent a software update fixing a safety problem in its electric vehicles, apparently heading off a looming confrontation with US safety regulators.
But recall documents posted on the US National Highway Traffic Safety Administration (NHTSA) website did not address another safety issue specified by the agency when it demanded that Tesla explain why it was not doing recalls for safety-related software updates done over the internet.
The recall covers nearly 12,000 Teslas with a glitch in the Full Self-Driving software that can make the cars stop for no good reason. The company’s paperwork says the problems with automatic emergency braking can increase the risk of other vehicles hitting Teslas from behind.
A public recall allows owners to ensure repairs are done and that people buying cars know of potential safety problems. It also allows the NHTSA to make sure the recall addresses the safety issue. The agency can fine carmakers if they do not issue recalls quickly enough or if they do not fix all the problems.
The recall covers all four Tesla models — the S, X, 3 and Y. Tesla documents say a software update sent on October 23 introduced the glitch.
Company documents say Tesla started getting reports from owners the next day about phantom braking. In a matter of hours, the company says it cancelled further updates or reverted the software to a previous version. That disabled emergency braking on some of the vehicles.
On October 24, the company traced the cause to a communication disconnect between two computer chips. It developed another software update to fix the problem and sent it out on October 25, according to the documents. The company said it voluntarily agreed to do a recall on October 26.
The move appears to show that Tesla now will issue a recall when it pushes out software updates to fix safety issues. It also sets a precedent for other carmakers to do the same.
On October 12, regulators sent a letter to Tesla demanding to know why the company did not recall its vehicles when it sent a software update to fix a problem with its Autopilot partially automated driving system.
The update addressed detection of emergency vehicles parked on roads while crews responded to crashes.
The NHTSA opened an investigation of Autopilot in August after receiving reports of a dozen crashes into emergency vehicles.
The investigation covers 765,000 vehicles, almost everything that Tesla has sold in the US since the start of the 2014 model year. Of the dozen crashes that are part of the investigation, 17 people were injured and one was killed.
Tesla had until Monday to explain why it did not issue a recall for the Autopilot update. As of early Tuesday, the NHTSA had not posted any documents detailing Tesla’s response.
The agency said conversations with Tesla continued “to ensure that any safety defect is promptly acknowledged and addressed according to the National Traffic and Motor Vehicle Safety Act”.
The statement did not say if Tesla had responded to the agency’s questions on the Autopilot software update.
Tesla did a software update in late September that was intended to improve detection of emergency vehicle lights in low-light conditions.
The safety agency says Tesla is aware that federal law requires carmakers to do a recall if they find out that vehicles have safety defects.
Tesla says that Autopilot and Full Self-Driving are driver-assistance systems and cannot drive themselves, despite their names. The carmaker says drivers have to be ready to intervene at any time.
Selected Tesla drivers have been “beta testing” the Full Self-Driving software on public roads. The NHTSA has also asked the company for information about the testing, including a requirement that testers not disclose information.
