2015 NISSAN LEAF Power Train Problems

The car stopped responding to accelerator pedal and eventually stopped in the middle of the road just before a hill. Haven't noticed any error messages and instrument panels seemed normal. Switched off power and then turned on again, the car worked normally. I am going to bring the car to a service center but it seems hard to find an appointment.

CAR GOES INTO TURTLE MODE, LOSING ALL POWER. HAS HAPPENED A FEW TIMES, EACH TIME HAS BEEN COMING OFF A HIGHWAY OR HEADING UP A STEEP HILL AND THEN TRAVELING AT LOW SPEEDS. WHEN CAR IS TURNED OFF AND ON, CODES RESET. I HAVE A READER FOR THE OBD, IT IS SHOWING FAULT P2138 000A EV/ HEC ACC PEDAL POS SENS 1,2, ERR EVC-196. AS POWER IS COMPLETELY LOST, THIS COULD EASILY CAUSE AN ACCIDENT. ONCE RESET THE CAR ACTS LIKE NORMAL. EVERY INSTANCE HAS HAPPENED WITH A BATTERY STATE OF CHARGE OF OVER 30%. *TR

MY 2015 LEAF S IS 3 WEEKS OLD WITH LESS THAN 700 MILES. I WAS DESCENDING AN 8% GRADE HILL IN B MODE WITH A SHARP BEND AT THE BOTTOM. AS I WENT TO APPLY THE BRAKES, THE PEDAL WENT TO THE FLOOR AND B MODE CUT OUT. THE CAR WAS NOW ROLLING DOWN THE HILL AND ACCELERATING UNDER GRAVITY WITH NO BRAKES AND WITHOUT B MODE SLOWING THE CAR. I WAS EXPECTING TO HIT A BRICK WALL AT THE BOTTOM OF THE HILL WHEN SUDDENLY, AFTER NO MORE THAN TWO SECONDS, THE BRAKES AND B MODE CAME BACK ON AND I SAFELY STOPPED. ON REFLECTION AFTER THE INCIDENT, IT WAS AS IF THE WHOLE COMPUTER/ELECTRONICS MOMENTARILY SHUT DOWN AND THEN REBOOTED. I DIDN'T NOTICE IF THE DASH LIGHTS WENT OFF OR NOT. *TR