2024 Honda Prologue

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.

Unable to charge the vehicle or heat the cabin of the car when running. When turning the heat up a burning odor was observed. Dashboard warning messages state “service high voltage system”, “service vehicle soon”, and reduced acceleration, drive with care. The dealership has been in contact with the manufacturer to try and address the issue but recommended parts are on back order with no ETA. Vehicle was purchased new with 127 miles on odometer and problem occurred at about 700 miles, 3 weeks after taking possession of the vehicle.

The Propulsion System Error warning light (a red car icon with an exclamation point) has appeared multiple times since I purchased the vehicle. This has occurred while driving, charging, or turning on the vehicle, with no apparent cause or trigger that I can identify. I have made several attempts to have the issue resolved by Honda, but they repeatedly provide excuses, such as the unavailability of an EV technician or the lack of proper equipment to update the car's computer software. During the most recent occurrence, I was driving when the error light came on, and I experienced reduced acceleration—something I don’t recall happening before. This presents a significant safety concern for me and others on the road. A sudden reduction in speed increases the risk of being rear-ended by an inattentive driver, or worse, becoming stranded in the middle of a travel lane. Honda has inspected the vehicle previously and documented the error codes and they have just cleared the codes or updated the software on the car. No additional symptoms were present leading up to the issue. This ongoing problem needs urgent attention to ensure the safety and reliability of the vehicle.