Musk, responding to a user's concern regarding how the autonomous driving features function in the case of two lanes merging, said that the autopilot's issue is fully fixed in the next update. Individual self-driving "features" may amount to little more than further enhancements of Autopilot.
The last time Tesla updated its software was with version 8.0 in 2016. What's more, Tesla claims that the auto will have a range of 620 miles.
"To date, Autopilot resources have rightly focused entirely on safety", Elon Musk tweeted.
In another fatal accident previous year, Tesla's Autopilot failed to detect a truck crossing the road, but investigators pointed out the driver was watching a movie at the time and not paying attention with the semi-autonomous system in operation.
Tesla declined to confirm which features will be offered in the upcoming update, nor when the promised full self-driving functionality will be available.
A consumer advocacy group on Friday urged Tesla to fix what it termed as "flaws" in Autopilot after a preliminary government report found that a Model X driver did not have his hands on the vehicle's steering wheel in the final six seconds before a fatal crash on March 23.
"The software update is good news", said analyst Chaim Siegel from Elazar Advisors, adding the stock was still benefiting from last week's prediction by Musk that it would finally hit its production target for its Model 3 sedan.
The company is counting on Model 3 sales to help it reach profitability.
Autopilot in its current form is a driver-assistance system that still requires the driver to pay attention and be ready to take control of the steering wheel.