NHTSA Complaint #11496885 — 2021 HONDA PILOT

The issue is with a restart after the car engaged the auto idle stop feature. Outside temperature was about 43F, Car had been driven earlier in day, and was parked for about 1 hour. The car started okay after sitting for an hour, then driven at highway speeds for about 10 mins. Car then came to a stop once coming off the highway at a red light. The car's auto idle engaged and the car's engine shut off. As the light turned green, my foot was taken off the brake to start the engine again and the car did not start. I received a message on the dash stating to place car in Park and start the engine, this was done but did not restart the engine. I shut the car off completely and had to use a lithium ion jumper battery pack to restart the engine. At that point the engine did start back immediately. Once home I tested the battery's voltage with a voltage meter, which read about 12.1V. I started the car with the voltage meter attached and voltage did not get below 10V and the car started without assistance. Thus proving that the battery is in good condition. The car was purchased in November of 2020, thus the battery about 2 years old and the car has just under 30K miles. I have not contacted the dealer yet. This is the first time this issue has occurred though there have been other times when starting from the idle stop the car has had difficulty in starting, starting this summer (July 2020). Difficulty has been noticed in the hotter or colder weather.