Four days after returning a Ford Mustang, the FordPass app installed on the phone of Masamba Sinclair continues to give him control ... returning the car may want to maintain remote access.

One startup is developing technology to serve as a missing link: controlling the car by remote control. Phantom Auto is hoping its technology could help autonomous cars reach market later this year.

At the moment, however, vehicles are being delivered with a “safety driver” sitting behind the wheel who can take control of the car if necessary. Fetch hopes to go fully remote after 18 ...