2024 Honda Prologue fuel/propulsion system problems

“On the morning of October 6, 2026, approximately 0500 PST, the vehicle displayed a "Service High Voltage System" warning on startup and the estimated range display went blank ("-- mi"). The high-voltage battery system was not delivering power. This appears to be the same defect reported by multiple other 2024 Prologue owners (sudden HV system fault, reduced or no propulsion, loss of charging). It also states battery is low, separate from the HV message. Honda Roadside Assistance will be contacted today and I will request the vehicle be towed to the (a) dealer as the vehicle is not able to move at all nor do I feel safe to operate the vehicle as I am and would be concerned about potential loss of propulsion while driving if this fault occurs at speed.”

“I was driving a 2024 Honda Prologue Elite and was coming to an ordinary stop at a safe distance behind another car at a red light. With my foot continuously and firmly pressed on the brake pedal, a brake alert/warning appeared on the dashboard screen accompanied by beeping, and the emergency brakes automatically engaged, stopping the car abruptly. Then, almost immediately, the vehicle suddenly lurched forward without warning, striking the vehicle ahead of me. I kept my foot firmly on the brake as the warning, beeping, and auto-brake activated again, and the vehicle lurched forward a second time, again striking the vehicle in front of me. This sequence repeated a third time with the same warning/beeping/braking and lurching pattern, causing a third forward impact. The vehicle came to a stop between each lurch, and at no point did I remove my foot from the brake or touch the accelerator pedal. There were no other witnesses besides the other driver involved, and no police report was filed at the scene. I believe this was caused by a major vehicle malfunction, not driver error. Upon further reflection, I want to note that while I believe I was in the last moment of…”

“My vehicle constantly receives an error message while driving stating, "SERVICE HIGH VOLTAGE SYSTEM" and "REDUCED ACCELERATION DRIVE WITH CARE." Error symbols appear on the dashboard that show an orange turtle, a red battery with a big exclamation point through it and and a red car outline with a big exclamation point going through the middle of it. When this happens, the vehicle acceleration is significantly reduced and the regenerative braking or "one-pedal" feature automatically becomes disabled. If you're relying on that system to brake, it will not do so when you need it to and you have to manually press the brake to slow and stop the vehicle. This error clears after a few days of driving but never fails to return. The dealer said they found nothing wrong when I brought it in (when the error wasn't being displayed, of course) but it went back today with the error displayed so they could witness it for themselves. Separately, the vehicle makes an incredibly loud knocking noise when accelerating with the wheel turned. It appears this is coming from the CV joints.”

“Broken/Clicking CV joints. This could lead to all loss of power transfer to the wheels, causing a sudden and unexpected stop to the vehicle while driving. Honda is aware of this defect, but has no permanent fix. This is confirmed by multiple Honda Service Centers. High Voltage Warning. Loss of heat, car will not charge, car shuts down/becomes undrivable, or enters "limp mode." This is an extreme safety issue. The car loses the ability to properly cool the main battery. This could result in thermal runaway (a rapid, uncontrollable, and self-sustaining increase in battery cell temperature), resulting in a fire that is difficult to extinguish, burns extremely hot, may reignite hours or days after the initial incident, and/or result in explosion. This is confirmed by multiple Honda Dealerships. The warning has occurred multiple times, even after multiple repair attempts.”

“Clicking noises when turning. Dealership no longer fixing (fixed passenger side, driver side still unrepaired). Front end collision breaking happening at random, causing unsafe breaking in the middle of the road. Also frequently happening when releasing break at stop light, narrowly avoiding multiple rear end collisions due to breaks being slammed on by vehicle collision system. Now with high voltage battery failure message, blowing cold air out of hvac system and performing at reduced acceleration.”

“High voltage warning light, service vehicle soon light, reduced speed limit, would not charge past 25%, forward looking camera issues warning light would show up randomly Called the local Honda dealer(01/26/26), talked with service manager, He told me to bring the vehicle in immediately. The Honda dealer refused to fix it under warranty since it was in an accident.(Right fender and driver door needed repaired.) The dealer wanted $300 dollars to perform a diagnostic test on vehicle. Dealer found that the HVAC system had failed which also includes the 12 volt charging system to also fail. Dealer wanted an additional $800 for further diagnostic testing. Informed me that the full warranty was void do to it being in a previous accident and I will be responsible for all repairs for this vehicle. Contacted Honda headquarters and filed a complaint thru them. The car was towed to another dealer where they are working on it currently. No new updates as of 02/02/26”