Tesla recalls 2 million cars after regulators find that its Autopilot doesn't do enough to stop misuse

• Tesla is recalling more than 2 million cars with an over-the-air software update.
• A two-year NHTSA investigation found its Autopilot system's "unique design" means it can be misused.
• It is the second recall involving Tesla's automated-driving features this year.

Tesla is recalling over 2 million vehicles because the Autopilot system doesn't do enough to prevent drivers from misusing it, the National Highway Traffic Safety Administration said Wednesday.

It comes as a result of the NHTSA's two-year investigation into Tesla, which will remain open as it monitors "the efficacy of Tesla's remedies," an agency spokesperson told Business Insider.