Federal regulators have opened a probe into whether Tesla's steering wheel-free Cybercab conflicts with safety standards. The inquiry focuses on whether the vehicle may have an option for human control.

According to the Wall Street Journal US Business, the investigation adds pressure on Tesla as it advances autonomous vehicle plans. The Cybercab, designed without a steering wheel, raises questions about compliance with existing safety rules.

Regulators are examining if the design allows for any human intervention, a key issue for approval. The outcome could affect Tesla's timeline for launching the vehicle.