2025 Honda Prologue

During a normal commute on the highway, the vehicle suddenly lost all engine power and stalled in the middle of high speed traffic. The vehicle could not exceed 8 mph while attempting to pull to the side of the road for safety. There were no warning lights (other than a low tire pressures - normal for cold days) and no error messages. The car was unable to get started for about 10 minutes. Eventually, the engine started and the vehicle was able to make it back to our residence. The battery was near 55% at the time of the incident (out of a maximum of 80% recommended charge) In terms of safety, this was a near fatal incident, as suddenly losing power and stalling in the middle of the highway during high speed traffic and snowy conditions could have been devastating.

My vehicle recently began displaying the error messages “Service High-Voltage System” and “Reduced Acceleration – Drive With Care.” Since these warnings appeared, my vehicle’s heating system no longer works at all. This defect creates multiple serious safety hazards: 1.No heat in cold weather: Temperatures in my area are currently around 42°F, and the cabin cannot warm up. This creates an unsafe temperature environment for myself and especially for my children while driving. 2.No ability to defrost windows: Without heat, the vehicle cannot defog or defrost the windshield or windows. This severely impacts visibility and creates a dangerous driving condition. 3.Reduced acceleration: The vehicle warns of reduced performance, which may affect my ability to safely merge, change lanes, or respond to traffic conditions. These issues began without warning, and the loss of heating combined with high-voltage system errors makes me concerned about a potential electrical or battery system failure. This is a significant safety concern that needs to be investigated, as the vehicle is not safe to operate in its current state. I request that NHTSA look into this issue, as other owners have reported experiencing this same dangerous combination of high-voltage errors and loss of essential climate-control functions with no resolution from the manufacturer.