High voltage system warning light came on dashboard, reduced acceleration occurred while driving today, 1/9/26. This is my second Vehicle Complaint form regarding High Voltage System failure. High Voltage Battery was replaced after first incident which occurred on 11/25/25, and car spent 37 days at dealership for diagnosis and high voltage battery replacement. Car is now back at dealership for diagnosis and possible 2nd high voltage battery replacement today, 1/9/26.
2024 Honda Prologue fuel system complaints
Page 2 of 3: complaints 11 to 40 of 42, newest first, as owners wrote them.
Leased this car 1 year ago and it is currently in the repair shop for the 2nd time in a year for the same battery problem: battery won't charge and an error notice on the dashboard that says " Service high voltage system. Reduce acceleration. Drive with care". The first time the shop said that it was a software issue and fixed it. Now the shop is saying that the car needs a new battery. The error notice came up while I was on a road trip and I felt unsafe knowing that the battery could fail or combust while driving. Also, I did not feel safe having the reduced acceleration in effect while I was on the freeway where acceleration can be essential to match traffic and evade accidents.
The “check high voltage system” warning came on, we noticed the hearing stopped. This started after 12,000 miles. The dealership said they fixed it and gave it back the warning reappeared a few days later, same events we lost heat and then the warning came back on. We have it back at the dealership they still don’t know what’s wrong.
I have had multiple issues with this vehicle and it has been in the shop more than 80 days between April and Oct 2025. First, the entire battery system went out in the all electric vehicle. Honda said that since it was a collaboration car with GM, that it would take a long time to fix because their technicians weren’t very familiar. It took almost 8 weeks in the shop before we got it back. Not long after, the entire dash (electronics) went out and the shop had it again for over a week. they never found or could replicate the issue. The vehicle went back in after having multiple incidents of emergency braking when there was no emergency, or even vehicles in my vicinity. The final time this happened, I was traveling nearly 25 miles per hour and the car decided to slam on the brakes, making me feel like I hit a brick wall. My head slammed the steering wheel and my daughter was terrified. I drove it straight to the dealership and they said “what’s wrong with the car this time”…they had it for weeks, couldn’t replicate the issue and tell me it’s fine and to take it home. They suggest TURNING OFF THE SAFETY STSTEM AS A FIX, which seems criminal. The safety features should work properly. I shouldn’t be instructed to turn them off. I am very frustrated and have been working with Honda on a buy back out of good faith, but it’s been weeks and we have no answer. I am forced to drive a gas vehicle, costing me gas money now, when I bought an electric vehicle to avoid this cost. All around, it has cost me more money than it’s been worth and I’ve made multiple car payments as it’s sat at a dealership unusable. Again, it has spent more than 80 days in 6 months at the dealer with no resolution. My sound system blew out last time they had it checking out the braking issue so I waited another week to have that replaced, meanwhile the fix to the braking system was that I was told to turn the safety feature off. Insane
Yesterday 11/30/25 we were going on the freeway about 60 mph, when suddenly I got the warning that my battery and acceleration were impacted due to a battery issue. States to service battery soon. It stayed that way as we were headed to have some blood work. That warning continued until the evening when it disappeared so thought it was a glitch. I still setup an appointment to have it checked at the dealership on Thursday 12/4/25 at 8:15am. On 12/1/25 at around 7:35am I was about to break at a light when I feel this jolt from my car and the same warning lights stayed on. I was really concerned so when I got off and went to work I immediately called the service department to move my appointment up to Tuesday 12/2/25 at 7am first thing. I dropped off the car at night for them to work on it. This seemed to impact also the Heater as it was cold air coming from my vents. I have seen this issue in Facebook and Reddit but felt I may not experience it as I had 8000+ miles on it with various long road trips. But now I am worried about the reliability and safety of this vehicle. Hope they can fix it and soon.
The contact owns a 2024 Honda Prologue. The contact stated that while attempting to start the vehicle, the vehicle briefly failed to start as expected, but internal electronics showed signs of power. After which, the message "Battery Low" and "Service High Voltage System" were displayed, even though the battery indicator showed that the battery was charged to 90%. The vehicle returned to normal functionality, but the failure became a regular occurrence. The Hybrid Battery warning light was illuminated. The vehicle was towed to the dealer, who informed the contact that the vehicle was functioning as intended during the time it was in the service center for diagnosis, and no faults were found. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 10,900.
Service high voltage error keeps coming on. Have had it serviced by the dealer multiple times. Seems to be a common error with all Honda prologues but Honda has yet to address the problem.
Knocking sound in the front when turning Honda states normal axel problem. For Fuel/battery . Been in a back and forth with Honda service/Honda motors because I’m getting less then advertised on my range performance. Example I drove a 60 mile drive and car drained 109z that’s 49 miles unaccounted for. I am now being told by Honda Motors mediation that the battery loses 30/40 percent efficiency in cold weather. That’s horrible. It’s not advertised and it’s unacceptable. It’s unsafe that customers can’t depend on the vehicle when an emergency happens.
Automatic braking is very sensitive, especially in the rain, and even more so when backing up in the rain. The unexpected braking happened to me at a rotary for no apparent reason, and numerous times in reverse. Service Vehicle Soon Light/(Propulsion System Failure) came on randomly at around 4000 miles. Within a day or so it turned off. Nothing with the car seemed to be effected. Then around 4500 symbol turned on again and has been on for a day or so. No notable issues.
On April 19, 2025, the "Engine/Battery Fault" warning light illuminated on my vehicle. At the time, the car had only 1,398 miles on the odometer and had been purchased just one month prior. Shortly after the warning appeared, I received a diagnostic report from OnStar indicating fault code U362A. The vehicle exhibited significantly reduced acceleration and limited charging capability. Concerned about the issue, I brought the car to the dealership where I purchased it for inspection and service. The dealership performed a reset of the main computer system, which cleared the warning light. However, I remain concerned about the reliability of the vehicle. If this issue were to occur again—especially while driving in a remote area—I could be left stranded without the ability to drive or charge the car. While the problem has not resurfaced since the reset, I am worried it may return unexpectedly, affecting my confidence in taking the vehicle on longer trips.
Vehicle with purchase on April 15, 2025 pre own with only 5800 miles. Drove the car for less than 2 weeks on April 28,2025 a vehicle warning pop-up “ high voltage service error” I took it back to Honda dealership. A code U3620 came up. The code indicated a high voltage battery replacement needed. Currently ETA for the parts is not available.
three codes telling me there is a issue - reduce acceleration drive with care - service vehicle soon - service high voltage system
I leased this vehicle approximately three weeks ago, yesterday as I was adjusting the dashboard lighting, the service high voltage battery warning came on. Now the vehicle wont take a charge, the vehicle has changed the charge setting to 40%, and I cannot increase it. I 've reserved an appointment for 4/11/2025 for the vehicle to be serviced, and was told that I wont be given a loaner vehicle. This entire scenario is very inconvenient to say the least. This my first Honda and probably my last. I feel that my safety is at risk in this case, as I cant drive it now, since I cant recharge the battery, so the vehicle is totally unreliable at this time. There were no warning signs of this issue, and I'm grateful that the vehicle didnt die in the middle of rush hour traffic, or leave me stranded somewhere.
I was driving and a warning popped up on my dashboard screen telling me that the "high voltage electrical system needed to be serviced" and another one followed that said "acceleration reduced drive with caution." At the same time my heat stopped working and only cold air would blow from the vents (it was a cold day so I did not test to see if the A/C was also broken). I discovered a day or so later, when I went to charge my car (it is an EV) that it would not allow me to charge above 26% capacity.
Car was charging on a typical 48A J1722 home charger. Car stopped charging early and displayed "Service High Voltage System" and "Reduced Acceleration. Drive with Care" Scanner shows codes P1E00 and U362C
2024 Honda Prologue has been having service high voltage system, reduced acceleration, no heat or AC in while in the rain and with toddlers in the car. Car has had this issue twice before and just got the car back from the service on April 2, Had issue in December, Feb 2025 for 11 days. The vehicle was just returned 3 days ago for the same issue. Service keeps stating they don't know what the problem and vehicle is needs to be towed due to inability to charge or drive on Major roadway due to limited speed.
We received a High Voltage System warning, making the vehicle undrivable. Honda states it is an AC check valve issue. The vehicle only has 477 miles on it.
After updating my Prologue and driving it for a few miles, I'm now seeing a message that says: "Service High Voltage System / Service vehicle soon." The car will not accept a charge at all and the heat/defroster will not work. It will only blow cold air (which may just be outside air circulating meaning full hvac isn’t working).
High voltage system errors. Won’t charge. Car is 2 weeks old!
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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)
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