2024 Honda Prologue

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.

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.