2016 NISSAN LEAF Power Train Problems

On January 9, a little after 12:30 pm, on Indian Head Highway (MD route 210) northbound near the Manokeek exit, after limiting drive power owing to battery degradation and cold weather (about 30 F) drive power and power steering failed entirely. There was no warning to pull over so I suspect this is an undocumented failure mode. After the car was towed home, it would not charge when plugged in until after I disconnected the 12 v battery and reconnected it after about ten minutes. It would then charge and after a few minutes I checked and it would send power to the wheels and power steering again. The state of charge of the lithium ion battery was about 86% throughout. This was not a failure of the on board 12 v battery charging system or 12 v battery which the tow truck driver tested as good, it is quite...

While driving at highway speeds (65mph) on a cold day (10-20F), the car lost all drive power with no warning. Driver was able to coast to the road margin. In another situation this could have been a catastrophic accident. Driver called 911 for police protection and tow. At this point car was completely unresponsive but still on. The car could not be turned off, turned on, shifted into drive, or any other action performed. The car has shown at least 3 other cold weather failures at highway speeds with various error states (ranging from turtle mode, a complete loss of the info display, and sudden power losses). Our mechanic said "I almost died today, this car is not safe to drive on the highway".

Car shifted into neutral at highway speeds and would not go back into drive on 3 separate occasions over the past 6 days. Car is an EV and there was no warning and the battery SOC was 50% or more on all occasions. Can can be shifted from neutral to park only, not drive or reverse. Very unsafe to have to cruise to a stop on busy highways without much or any shoulder depending on where the car stops with snow banks. Had to have car towed. The incidents happened separately on 1/27, 1/28, and 2/2 all on the highway at ~60mph. I will upload some pictures of the dtc codes and battery stats for the vehicle. After the incident on 1/27, I replaced my 12v battery with a new one (having done some searching for possible cause), but the issue happened again on 1/28 and 2/2 after the 12v...