2025 Honda Prologue

While driving yesterday the service high voltage system light came on again. I have brought my vehicle to Honda 2 other times for the exact same issue. They fix whatever the issue is and the problem happens again. That last time it was about a month after bringing it to them but this time is has been 3 possibly 4 months but I have have the car less than 1 year.

This issue has occurred twice. The first time was at approximately 3,000 miles, and the second time at around 7,200 miles. On both occasions, the vehicle lost power and displayed a warning message stating “Service High Voltage System” along with a “Reduced Speed” notification. During these events, the estimated driving range dropped significantly, charging was limited to approximately 25%, and acceleration was severely restricted, indicated by a turtle icon on the dashboard. After the first occurrence, the vehicle remained undrivable for approximately three days over Thanksgiving. By the time I was able to bring it to the dealership on the next available business day, the warning light had turned off. I was advised to bring the vehicle in immediately if the issue happened again. The issue did not reoccur for about three months. When it happened again, I was out of town and the estimated range dropped from over 100 miles to around 60 miles. I was able to make it home without requiring a tow and brought the vehicle to the dealership the following day. At check-in, the service advisor observed that the warning lights were still active. However, later that day I was informed that by the time the vehicle was inspected, the warning lights had turned off, and no action could be taken. Based on information found in online owner forums, this appears to be a known issue potentially related to a defective component. It has also been suggested that the issue is more likely to occur in colder conditions. Due to the unpredictability of this failure and the loss of power and range when it occurs, I do not feel confident in the reliability of the vehicle, particularly for longer trips or travel in remote areas.

While merging onto the freeway in [XXX] today, I was slowing in response to a metered light but did not come to a complete stop. When the light turned green, and I accelerated, the vehicle suddenly jolted and produced a loud impact noise, similar to hitting a large pothole. I returned to the on-ramp to check the roadway but found no visible obstruction or hazard that would explain the incident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Happens frequently. While it has not yet caused the vehicle to fully slam on the brakes, it will occasionally flash the brake warning and apply the brakes even when there are no obstacles present. Additionally, when backing out of the driveway, the vehicle sometimes detects the road surface as an obstruction and abruptly applies the brakes. This occurs consistently in the same location, likely due to the steep angle of the driveway.