What 795 owners told NHTSA about the 2024 Honda Prologue EV

High voltage system errors. Won’t charge. Car is 2 weeks old!

NHTSA ODI 11650859

When starting vehicle, lights for Propulsion Power is Limited lights and service vehicle soon lights came on. I tried to shift into reverse, but got a warning message that the conditions for shifting error, I also could not shift to drive. I only have had the car for 2 weeks. I called the honda warranty, they arranged to have it towed to dealership. 2 different service people tried troubleshooting the problem on site with no success. It was towed and dropped off after hours at a Honda service center. The tech called the next day stating that the problem could not be recreated and all diagnostic tests came out good. Waiting and wondering when this car is going to leave me stranded again.

NHTSA ODI 11649110

Service High Voltage System warning. Have had this come up on my car and I have seen that this is a design issue with the battery cooling system. I am glad that the car did not just shut off while I was driving. Honda/GM need to make this car right. And this issue is happening to everyone. Please help us.

NHTSA ODI 11645247

When accelerating into a turn from a complete stop, left turn or right turn, there is a knocking sound coming from the cv joint. Vehicle made this sound when driving off the lot brand new. Vehicle also experienced a battery fault error/reduced propulsion warning at 700 miles and is currently at the dealer to investigate. The error alternates with the battery fault light indicating a fault with the high voltage battery and the propulsion power is limited light. This error occurred after preconditioning at 30% battery charge in 32 degree weather. The vehicle warmed up the interior but displayed the message as soon as I put the car into reverse gear. Both of these issues are safety issues in potential loss of steering and loss of propulsion power on the road.

NHTSA ODI 11642753

Pulled out of our driveway and received a message that "AWD Temporarily Unavailable". This message did not indicate that this fault disables one-pedal driving. Upon reaching the end of my street at the stop sign, I gently let my foot off the accelerator expecting the car to slow down as it should when using one-pedal driving. Instead the car continued to move forward and I almost went through a stop sign into a busy road where I would have for sure gotten into a bad accident. Not informing the driver that this fault also disables one-pedal driving is extremely hazardous.

NHTSA ODI 11642391

Twice, a "service high voltage" error light has come on and it has said it impacts the ADAS and safety systems and the acceleration of the vehicle. The light disappeared after a short drive, but the heating system stopped working. The first time, we took it to the dealership and they reset the system and the heat came back a little, but seems to struggle under 32 degrees, and especially sub 15/20 degrees. The second time was this morning - the heat is barely working at all. Very frustrating for a vehicle under 2000 miles.

NHTSA ODI 11640457

I was driving in the highway, at ~70mph with cruise control on when the error popped up. The temp was been 47-52°F. I got a message saying Service High Voltage System. I thought nothing of it and proceeded with rest of my trip. I went to even colder conditions and got down to 28°F at one point. I noticed that in the car, the AC was not working, it was only blowing cold air from outside. Eventually went to charge and and the car refused. I was 70 miles from home but was able to get a tow.

NHTSA ODI 11639839

Propulsion System Failure light came on and vehicle lost all cabin heat. This occurred in winter (January) and since there is no heat all vehicle windows fog over, obscuring the view of the road and other drivers. All vehicle occupants are also at risk of exposure due to complete lack of heating in sub-freezing January temperatures.

NHTSA ODI 11639947

I purchased a Honda Prologue from my local dealer with just 8 miles on it. At 97 miles, multiple warning lights appeared, including "Service High Voltage System" and "Service Vehicle Soon." Additionally, the vehicle would not allow me to charge the battery once these warnings were displayed and acceleration was reduced. I took it to the dealer, where they diagnosed an overcharged AC system causing battery cooling issues. They removed 1.270 kg from the system, cleared the codes, and tested to ensure proper levels before returning the vehicle to me. After driving for another week, the same warning lights reappeared, and now, with only 360 miles on it, the vehicle is back at the dealer for further diagnosis for the same warning lights. It does not appear an overcharged AC system was the cause. For a brand-new car with less than 500 miles, this is completely unacceptable from Honda.

NHTSA ODI 11639565

Within two weeks of purchase from dealer, the car began having warning lights “service high voltage system”,“acceleration reduced”, “service vehicle soon”. Additionally this electric car would not allow me to charge the battery once these warning lights were displayed. Car has been towed to dealer for repair. Several attempts have been made to get update on repair time and my inquiries have not been responded to. I’m now stuck paying for a car that is less than two weeks old with less than 1,000 miles on it. All I have been told is that a call was made to the OEM based on the error codes that were read by the dealers system on intake. They aren’t telling me anything in terms of what the issue is, what the OEM fix is or a time of repair. The US govt NEEDS to be investigating Honda for consumer fraud related to this vehicle as I’ve now learned that I’m not alone and there are now numerous online forums describing the same situation I’m in presently. It’s immoral to sell a $60,000 car with a known fault and not disclose these faults prior to purchase. I would have never purchased this car had I known ahead of time that there were significant known issues that could render the vehicle inoperable within weeks of purchase.

NHTSA ODI 11637854

For the second time in 7 months since I’ve owned the car, I need to get it serviced for an error on the panel names “System Voltage Error”. As a result, the car can’t be charged (EV), the heating doesn’t work in the middle of winter, and acceleration is reduced.

NHTSA ODI 11637317

Car makes loud knocking sound when turning, especially when cold. Started almost immediately after taking delivery. Happens every time drive car and is getting worse. Available to inspect. Safety risk if drive axle snaps. Not inspected by anyone, but a known issue in owners' forums and among dealer service departments: [XXX] No warnings or codes thrown. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ODI 11637067

Adaptive Cruise Control and Lane Keeping Assistance was unavailable more than 4 times in one month. Got a propulsion waning light 3 times. On the third time, the dealer ordered a new EV Battery for my Prologue

NHTSA ODI 11636932

The car reduced speed, shut down heat and an error code for high voltage issue appeared. The car was in the shop for 3.5 weeks while Honda misdiagnosed issue then repaired cooling issue on battery

NHTSA ODI 11636668