A Tesla driver was stranded in Red Rock Canyon near LA because the car’s keyless control app crashed. What a day he had! He went for a drive around the canyon only with a phone in his pocket, bearing in mind that he can unlock and power his Model S car via a smartphone app.

The keyless smartphone feature that lets Tesla owners to power and unlock their cars is available through Tesla’s iPhone and Android apps. One of the main features of the app, not the best, though, is the ability to “unlock and drive Model S without your key”.

Unfortunately, Negri could only start his journey with this feature, but not finish it. After being six miles away from home, he decided to turn back, but before that, he went out of the vehicle to adjust something.

Little did he know that he needed a phone signal for the app to work properly. He found himself 6 miles away from home, locked out of the car and unable to get back in and start it.

With no cell service, it is unable to connect to Tesla’s servers to unlock or start the car. While wireless key technology is common, smartphone car control is still a new concept.

Stranded 6 miles from home, 2 miles from cell service; our Saturday morning. The thought was to go for a quick drive to take some photos of the freshly-fallen mountain snow. Having only my phone in my pocket, I unlocked and started the car with it, and we left. 6 miles down the road we decided to turn back, but before that, had to adjust Mozy & Millie's car bed, so I exited the vehicle…bad idea. Need to restart the car now, but, with no cell service, my phone can't connect to the car to unlock it. Even with cell service, the car would also need cell service to receive the signal to unlock. @amymnegri, the hero she is, started running to reach cell service height. After about 2 miles she reached signal and called a friend for a ride to the house to grab the key fob. The key that will always be with me (now) when I drive that car.

A post shared by Ryan Negri (@ryannegri) on

To save the day, Negri’s wife had to run two miles to find a signal and call a friend to bring the key fob. Nothing is ever as perfect as it seems. Tesla Model S drivers, beware!