Ihave searched the web and finally found somebody with the same problem as my Leaf has. My car stoppes when I am driving, ti doesnt mather if I drive fast or slow, in hot, or rain. It just happen. Now It has gone three days since the last time, but to night it happened two times ina row. And because it is an US-11 imported car ( i am in Norway), my NISSAN SERVICE-station dont know how they can solve it.
Here I have taken a picture of what happens when it stoppes. The radio, the light etc is still working:
Best Regard Sissel from Norway
My guess is you have an intermittent short somewhere on one of the can bus lines, probably on the EV bus. I would get Leaf Spy Pro and a ELM 327 and read the DTC's. You should have quite a few pertaining to "failed CAN communication." The modules which have the codes will be a clue on which bus to look.