I don't think any car keyless ignition requires the key to be present to continue running. You don't want a car to shut off on the highway if someone drops the key behind a metal object or the battery dies.

If you start a car, and then take the key out of the vehicle, you will get a message like this: https://i.ytimg.com/vi/Jo6gzVfAElc/maxresdefault.jpg

You will be able to drive the vehicle until it is put into park or shut off, and you won't be able to drive it again until the key is present again.

This has stranded some people who have done the following:

* start the car

* get out for some reason

* leave the key by accident

* get back in the car and drive away

* park at their destination

* they are now stranded without a key