Honda Accord Hybrid collision warning problems

Filed Sep 17, 2026 · Brakes, Electrical · TX

On August 23, 2026, the electronic power steering and braking systems on a 2025 Honda Accord Hybrid completely failed and locked up simultaneously while traveling at highway speeds. This caused an immediate and severe safety risk, resulting in a near-collision on a busy freeway with three occupants inside the vehicle. The vehicle is currently available for inspection upon request. Prior to and during the failure, widespread dashboard warning lights illuminated simultaneously, including the Collision Mitigation Braking System, Lane Keeping Assist System, Road Departure Mitigation, and Low Speed Braking Control. Additionally, 11 malfunction alerts were triggered via the HondaLink app. The vehicle was inspected by an authorized dealer from August 24 to September 11, 2026. As documented in the attached Honda dealer service report, technicians initially noted low voltage codes causing multiple system failures. However, instead of identifying and repairing the root cause of the voltage drop, the dealer merely cleared the codes, test-drove the vehicle, and closed the repair order stating they "could not duplicate concern." Furthermore, the attached text message conversation with the service advisor proves the service department explicitly admitted in writing that the software is up to date and that the failure could happen again if the vehicle encounters the same error. The vehicle has not been inspected by a manufacturer field engineer, police, or insurance representatives. American Honda Corporate refused requests to dispatch a field engineer and closed the case file. Note: Full video evidence of the dashboard warnings and loss of vehicle control during the incident exists, but cannot be attached here due to file format limitations. The manufacturer and dealer have returned this vehicle without identifying or repairing the underlying defect, leaving it highly susceptible to another catastrophic loss of steering and braking at highway speeds.

Filed Sep 29, 2025 · Acceleration, Brakes · TX

Component/System: Collision Mitigation Braking System (CMBS) or related software. Vehicle available for inspection. Safety Risk: Vehicle brakes or decelerates unexpectedly during normal driving, risking rear-end collisions. Most recent incident on August 23, 2025, required override by pressing accelerator and shifting to neutral in traffic. Reproduction: Dealer could not replicate issue during May 16, 2025 visit. No diagnostic codes found. Radar and braking systems reported as “operating normally.” A second evaluation occurred after September 5, 2025, with no resolution; issue persists. Inspection: Inspected by Honda dealership twice—on May 16, 2025 (Invoice #488382) and again after September 5, 2025. No third-party inspections. Symptoms: Braking occurs in Sport, Normal, and Econ modes. Happens when accelerating from stop or easing off accelerator. Brake light activates falsely. No warning lamps or messages prior to failure. Issue has occurred 10+ times over the past year. Related Software Issues: Radio failure (resolved via software update). Clock shows incorrect time. Apple CarPlay fails to connect until restart. Navigation compass shows concentric circles.

Filed Sep 5, 2025 · Driver assistance · OK

While traveling at approximately 55 mph yesterday, in daylight, with no other cars in front, back, or to the side of our car, it radically braked on its own. The collision mitigation system warning light has frequently flashed on the dashboard since we bought the car new in 2019 but never did it apply the brakes on its own. Dealerships over the years have told us "this just happens", and offered no fix for the false positive alerts. This is a dangerous situation which could result in an accident or even death of occupants if not resolved by Honda. I spoke with several dealerships since the phantom braking event and they tell me they hear this complaint often. Being an intermittent situation, it is extremely difficult to diagnose and resolve. Something needs to be done.

Filed Jul 1, 2025 · Driver assistance · CA

All of sudden, no incident, no accident, a lot of things were disabled such as Adaptive Cruise Control , Forward Collision Warning , Lane Departure Warning and more while I was out of town (long range highway travel). When I went to Honda dealership, they blamed a few things and fixed them (expensive), then they said that the front camera needed a calibration. It was expensive. After that aiming correction, everything works fine. The camera was NOT broken. It just needed recalibration, and it costed about a thousand dollars. I would say it was caused by the poor design, which is Honda's fault. I googled this issue and found a lot of Honda owners had same issued and charged 1K ~2K for it. I will report it separately, but my Honda Odyssey has the exactly same issue now. I have 2 Honda cars, and both of them have the same issue. I strongly suggest that Honda should recall their front camera and they should reimburse the expense we already paid for it.

Filed May 9, 2025 · Driver assistance · MI

Since the first winter after I purchased my vehicle in 2021, typically when cold, but not always, I lose all the Honda Sensing (Advanced Driver Assist Features). The dashboard lights up with the following warnings . - Collision Mitigation Braking System Problem. See Dealer - Road Departure Mitigation System Problem. See Dealer - Auto High Beam Problem. See Dealer - Adaptive Cruise Control System Problem. See Dealer - Lane Keep Assist System Problem. See Dealer This failure of these safety systems can last anywhere from 5-60 minutes. Sometimes if you shut the vehicle off and turn it back on again, the warning will go away. On multiple cold mornings (below ~45°F), my 2021 Accord Hybrid displays a cascade of safety system failure warnings upon startup. The dash shows errors for the collision mitigation braking, lane keeping assist, adaptive cruise control, road departure mitigation, and more—all at once. When these systems are disabled, it severely compromises safety. This issue happens repeatedly in colder weather. The dealer has personally witnessed the issue in their service bay and acknowledged it's a known problem but had no fix, advising me to turn the car off and on again. This recurring failure of critical safety systems in cold conditions puts me, my passengers, and other road users at risk.

Filed Apr 7, 2025 · Electrical, Engine · IL

Vehicle Identification Number (VIN): [XXX] Vehicle Mileage: 29,200 miles Involved Honda Dealership: McGrath Honda, St. Charles, IL Details of Your Inquiry: I am seeking assistance regarding an ongoing issue with my 2023 Honda Accord Sport Hybrid. The first time I noticed this issue was in the summer of 2024, when I experienced a similar set of alerts while driving in a parking lot. At the time, I didn't think much of it, as the vehicle seemed to return to normal shortly afterward. However, on [XXX], the problem occurred again, but this time it was more serious. While driving in a subdivision in Bolingbrook, IL, at approximately 25-30 MPH around 8:10 PM, my vehicle malfunctioned and displayed numerous system alerts, including: Adaptive cruise control system problem, Collision mitigation braking system problem, Road departure mitigation system problem, Electric power steering system problem, Electric parking brake system problem, Tire pressure monitor system problem, Brake system problem, Brake hold system problem. Additionally, my Honda app sent a warning stating, “Brake system problem, drive with caution.” During this time, the vehicle experienced a significant loss of power, with no braking or acceleration available. I was unable to use the brake pedal or accelerate, which caused immediate safety concerns. Luckily, I was in a subdivision and not on a busier road like Weber Rd. or I-55, as this could have resulted in a dangerous accident. I was able to coast the vehicle to a stop at the side of the road, where I waited for a few minutes. I then cycled the vehicle off, waited a few more minutes, and turned it back on. The vehicle started, and I was able to drive back home. A video was recorded showing the alerts on the dashboard. I brought my vehicle to McGrath Honda for diagnostics on March 28, 2025. The dealership found multiple lost communication codes from various subsystems, but they were unable to replicate the issue. I am seeking guid INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (F

Filed Apr 3, 2025 · Driver assistance, Electrical · FL

Forward collision warning stopped working after a system upgrade on my 2019 Honda Accord hybrid. I activate the forward support and immediately it turns off. This is a safety issue. The system assist in breaking in time to maintain car distance and avoid a collision. Contacted Honda. I was told to take it to service at my cost.

Filed Feb 27, 2025 · Driver assistance, Electrical · AZ

Suddenly I get warnings of failure of adaptive cruise control, failure of braking, stearing and forward collision warning failure. It goes away if I drive my vehicle for few miles but then suddenly appears again. No one seems to know what is the issue. I tried to reset setting multiple times, checked system updates and checked battery etc, asked to check if there are any faulty codes but no one seem to know what is going on. It keeps happening every day

Filed Feb 20, 2025 · Brakes, Driver assistance · TX

I was driving on a highway when the engine light came on and the car immediately started slowing down even though I was pressing the gas pedal. It flashed there was a failure of the brake system, collision mitigation braking system, road departure mitigation system, hill start assist system, and adaptive cruise control system. The check battery light also came on. The car decelerated on its own with brakes engaged. I had to choice but to immediately pull over and luckily was able to steer to an off ramp and into a parking lot.

Filed Jan 26, 2025 · Brakes, Driver assistance · NC

When car has been stopped, in traffic or parking lot, the parking/emergency brake has engaged automatically (NOT engaged manually or intentionally by driver) and will not disengage automatically when accelerator is pressed to go forward. It is difficult to disengage the brake when this occurs. This has happened on 3 occasions. The safety risk for crash includes being hit from behind if brake engages unintentionally in traffic or on highway, or potentially sudden unintentional stopping while driving at moderate or high speeds. The issue was reported to dealer after twice occurring and full DTC check performed. Dealer says all diagnostics normal and could not identify any problems with parking/emergency brake or Collision Mitigation Braking System. The issue has occurred one time since the dealer inspection. The red light on the emergency break switch (console) comes on when this occurs, but no prior warning lamps or messages.