2018 NISSAN LEAF Electrical System Problems

I was traveling north on Freeway 57 at approximately 70mph. The dash lit up red with 12v and charging warnings. Power was shut off and car went into Neutral and warned me to pull over. This is an incredibly busy freeway and I was in the far left lane. I barely made it to the shoulder coasting before car started shuttering and jerking and stopped rolling. I could have been killed.

The contact owns a 2018 Nissan Leaf. The contact stated that after his wife had parked in a parking garage, the vehicle was restarted and driven in 17-degree Fahrenheit weather when the vehicle lost motive power. The "Service EV System, No Power" message was displayed. The contact's wife pulled over and had the vehicle towed to the dealer. The contact stated that the battery had previously been replaced. The dealer determined that the failure was caused by a frozen battery. After the battery had thawed, the battery was able to be recharged. No repair was recommended. The contact related the failure to the variable voltage control system and the 12-Volt battery amp-hours (Ah). The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 79,545.

Vehicle randomly shuts down when car is underload traveling at highway speed up an incline and with the climate on. Diagnostics are showing multiple cells that are bad in the main battery manufacturer is stating that it is normal wear and it is normal. I’ve only had the car for 300 miles. It was a previously owned car that was supposed to carry an eight year warranty on the drivetrain and battery. They are not honoring the warranty and the vehicle is dangerous to drive and in fact cannot be driven the situation occurred on three occasions where the vehicle just randomly shuts down on the freeway in the middle of the highway. This is a serious concern that will definitely cause injury or death. I attached photos of two occasions when the battery discharged almost immediately, and the one photo shows on the vehicle was completely disabled. I have...

Car was descending towards Kailua on the [XXX] on Oahu, HI. Dash lit up with warnings and acceleration and brake pedals stopped working. Brake pedal went to the floor with erratic pulsing sensation and very little brake power. Driver drove car into jersey wall to slow and stop vehicle. Battery state was 60% and battery was replaced under warranty about 1 year ago. While waiting for tow, powered on vehicle and symptoms remained as far as I could check. Brakes had no power and had to use ebrake to keep vehicle from rolling. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I was traveling home from work at approximately 60MPH (speed limit) and I experienced a rapid drop in the state of charge from ~60% to ~25% in 15-20 seconds. I slowed the vehicle to 55MPH and it recovered most of the state of charge. When accelerating to 60MPH a few miles later I experience the same behavior and was forced to maintain 55MPH. I was forced to turn off the electric cabin heater, heated seats, and heated steering wheel as well. I have been able to recreate the issue if the battery is: cold (outside temperature less than 15F and the vehicle has been outside for 8+ hours), less than 60% charged, and put under high load (going up a steep grade/60MPH+) the vehicle will register a battery discharge rate of ~5%/second and continue until the vehicle puts itself into turtle mode, the load is reduced, or I assume, shut...

Our 2018 Nissan Leaf experienced an error message when we tried to start it saying "Warning Service EV System No Power". Mileage: 29,862. It would go into neutral, but not into drive. We called GEICO to have it towed to dealership Leith Nissan on [XXX]. On [XXX], John Day from Leith Nissan called to request permission to install a new 12V battery. I approved the cost of replacing the battery. They said that they were able to drive the car after the 12V battery was replaced. But then they plugged it into the charger, and got an error message "EV System No Power", and they couldn't drive it anymore. Sometime after that there was a thermal event that caused the Power Distribution Module to explode and for soot to pour out of it. These incidents are described by the technician Ryan in these videos [XXX] Nissan indicated that the electric...

I was driving at 65 MPH on the freeway and the car was acting/driving normally. Without any warning at all, many lights appeared on the dashboard at the same time that the car placed itself into neutral and lost all power to drive. My speed was reduced so quickly without any notice and I had no pull out lane near me, so I was forced to move across 5 lanes of traffic in rush hour speeds of 60-85 MPH traffic in order to get to safety in a pull out lane while my car was quickly losing speed at 30 MPH and below. I tried to put the car back into drive but it was impossible and the dashboard read "EV maintenance needed". Of note, my entire battery was replaced less than 6 months prior and the Nissan Peoria (AZ) dealership reported no other issues with the vehicle. Upon inspection,...

Vehicle would rapidly suffer from a high energy drain when driving at freeway speeds. Range was reduces from 150 miles EPA, to 80-100 miles. Nissan at first said it was due to the high temperature in Arizona. A few weeks later a "Service EV System" lamp came on, and car would not start the next day after charging overnight. Car stated it was at %80 state of charge at the time. Car was towed to a Nissan service center, and Nissan service determined that some battery modules had bloated battery cells due to overheating after a week of troubleshooting. High voltage battery was replaced under warranty 3 weeks later.

Hello NHTSA: I purchased a 2018 Nissan Leaf from Carvana on December 29, 2022. Within a short period of time the car experienced seat belt and air bag warning lights. The car was repaired under factory warranty by HGreg Nissan in Cutler Bay Florida but continued to display warning lights. The satellite communications system was not able to be repaired. This failure deactivated certain convenience and safety features. On March 16, 2023 a warning message and display indicated there was a high voltage battery malfunction and the car needed to be repaired by the dealer, On March 20, 2023 the car was taken to the dealer. The dealer informed me that the car was unsafe to drive and would not, nor did they ever, return the car to me [with the exception of a one-week test drive that did not correct the reported issues]. On August 3, 2023 Nissan North...

The contact owns a 2018 Nissan Leaf. The contact stated that while driving approximately 60-65 MPH uphill, the vehicle went into protective safe mode due to a faulty signal, and would no longer exceed 20-25 MPH. The vehicle was taken to the dealer, who informed the contact that it was a known failure that occurred in cold weather. The contact stated that the failure reoccurred several times. The vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 38,225.

The PTC Heater and A/C compressor failed on my 2018 Nissan Leaf, just as the winter of 2022 was getting started. The vehicle passed prior service inspections, with no mention of issues on either of these components. The failure of the PTC heater and A/C compressor results in a "Service EV System" error message, and indication that the vehicle would not restart after powering off. When this error message appeared, the heating and defrost capabilities of the vehicle were lost. The fans would continue to blow air, but windows would fog up. I could not charge my vehicle in this error state either, so if I hadn't been close to home, I would've been in a potentially dangerous situation because it was cold out. The local Nissan dealership confirmed the error codes of P0AA6-1A (HV battery voltage system isolation) and P31E7 (restart inhibition) were present. They initially fixed this issue...

Around 45 degree weather, while driving on the freeway, my electric battery mileage started to fluctuate erratically (73% to 8% to 14% back to 70% and finally to 60%). It gave me low battery warnings two separate times. At the same time this happened, a warning light indicating the AEB had been turned off started flashing on my dashboard without any collision, jerky movements, sudden stops, or changes to settings. This is extremely concerning because of the car immediately brakes or if the battery dies on the freeway, it could cause a major collision.

2 incidents have occurred with this vehicle. The first earlier this year (2021) is that upon slowly accelerating to move closer to vehicle that moved up in a turn lane, the automatic emergency brake system engaged, abruptly stopped the vehicle and many lights lit up across the dashboard. The brakes then released and all lights on the dashboard disappeared. I was not close enough to the car ahead or at any rate of speed that should have caused this abrupt brake reaction. The 2nd incident and most dangerous happened on 8/13/21. I was slowly reversing out of a parking spot at a crowded location, when I saw a car behind my vehicle. I went to brake (not hard brake just regular), and the brakes did not work. I continued to slowly roll back towards the car behind me. I tried pressing the brakes repeatedly and it would not stop rolling...

THE CONTROL PANEL TOUCHSCREEN DISPLAY IN THE NISSAN LEAF (2018) HAS A DENIAL OF SERVICE VULNERABILITY THAT CAN BE USED TO LOCK UP THE SCREEN. ONCE LOCKED, THE TOUCH SCREEN CAN NO LONGER BE USED EVEN IF THE CAR IS TURNED OFF AND ON. THE ONLY WAY TO UNLOCK THE SCREEN IS BY REMOVING AND RE-INSERTING THE SD CARD CONTAINING THE MAPPING DATA. THIS SEEMS TO ARISE FROM THE SOS FUNCTIONALITY LOCKING THE TOUCHSCREEN AND NOT TURNING OFF WHEN THE CAR DOES. TO REPLICATE: 1. TURN ON THE CAR, VERIFY THAT NISSANCONNECT WITH SOS FUNCTIONALITY IS ENABLED BY CHECKING THAT THE LITTLE LIGHT ON THE SOS BUTTON IS LIT. 2. PRESS THE SOS BUTTON. 3. PRESS AND HOLD THE SOS BUTTON WHILE TURNING OFF THE CAR. 4. THE SOS CALL WILL LOCK THE SCREEN OF THE CAR, AND WILL STAY THAT WAY UNTIL THE SD CARD IS REMOVED AND RE-INSERTED....

WHILE DRIVING THE VEHICLE, WITHOUT WARNING THE CAR STOPPED ITSELF SIMULATING A "SLAMMING ON THE BRAKES" AFFECT. THERE WAS NO WARNING, THE CAR JUST STOPPED. AFTER THE CAR STOPPED, AN ERROR APPEARED ON THE SCREEN SAYING "POWER SUPPLY FAILURE. TO AVOID ACCIDENT, SERIOUS INJURY OR DEATH DO NOT DRIVE. CONTACT DEALER FOR SERVICE." THE CAR STOPPING SUDDENLY IS VERY DANGEROUS, IF THERE WAS ANOTHER CAR BEHIND ME, OR IF I WAS ON THE FREEWAY, I WOULD HAVE GOTTEN REAR ENDED.