Honda Odyssey collision warning problems

Filed Nov 7, 2026 · Driver assistance · NC

Just starting the vehicle one morning all of these warnings appeared including adaptive cruise control problem, lane keeping assist problem, collision mitigation system problem, road departure mitigation system problem and auto high beam problem. We replaced the 12V battery thinking that was the cause but this did not solve the problem. We checked the fuses that were recommended to check and they were intact. We then did the 10 minute drive as suggested to reset these systems which also did not work. Then we used an OBD2 sensor to reset/clear the codes which also did not work, they immediately came back once the car started again.

Filed Nov 6, 2026 · Driver assistance · MA

My 2019 Honda Odyssey, with approximately 93,947 miles, has developed an intermittent electronic braking and driver-assistance system malfunction. A yellow "Brake System" warning light appears on the dashboard, accompanied by warnings indicating that Adaptive Cruise Control (ACC) and Collision Mitigation Braking System (CMBS) are unavailable. A diagnostic scan identified trouble code U3000-49, suggesting a potential electronic control system malfunction. The exact defective component has not been confirmed. This is a serious safety concern because the vehicle's automatic collision mitigation and emergency braking assistance may unexpectedly become disabled, increasing the risk of a collision, especially during sudden braking or highway driving. The warnings occur intermittently without a clear trigger. The issue may involve a faulty camera, sensor, or electronic control module. The vehicle has not yet received a confirmed root-cause diagnosis from Honda. The vehicle remains available for inspection upon request. I request that the federal safety agency investigate whether this represents a widespread safety defect affecting 2019 Honda Odyssey vehicles.

Filed Nov 1, 2026 · Driver assistance · KY

The Forward Collision Warning (FCW) / Collision Mitigation Braking System (CMBS) have almost gotten me into 3 accidents in the past year. I bought the car brand new and it now has almost 13k miles. All three incidents have been when traveling at speed of 35-45 on divided highways with turn lanes and stop lights when passing large vehicles. The video clips I will upload unfortunately does not have volume but the brake sign pops up on the dash and the cat beeps loud and then slams on the brakes for no reason. Even if those vehicles were in my lane, it would have stopped me too late as you can tell by how the car dips in the videos. I don't want to turn off the "safety" feature in case something does actually happen in front of me but its put my family in danger more than it has helped. I was told by honda when it happened the first time to clean the glass in front of the cameras but they were clean. They dont seem to want to take responsibility for this. I see this issue on the 5th gen Odyssey group on Facebook often which ahs finally prompted me to come here and file this incident. Also since your website does not accept MP4 videos here is a link to the videos: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 26, 2026 · Acceleration, Driver assistance · IL

Over the course of 3 days, cruise control and lane assist systems would shut off and messages would display about adaptive cruise control, lane keep assist, lane departure warning, and collision avoidance system not working. Sometimes a transmission problem message would also become active. Sometimes the messages would be present at startup but other times the systems would show up green on the display and then the systems would shut off while driving causing the vehicle to suddenly slow down in highway traffic. The root issue seems to be a broken or malfunctioning multipurpose camera for the driver assist system. The camera has not been replaced yet to verify but related codes are active based on a code scanner and symptoms match what is expected for the camera failure. The vehicle is 6 years old with 99,400 miles at the first occurrence of the issue and does not have any windshield damage or signs of water leaking that would contribute to a failure. My primary concern is that the software completely disables cruise control when the camera for adaptive cruise and lane keep assist fails causing the vehicle to suddenly slow down rather than allow normal cruise control to continue operating and display the warning messages.

Filed Oct 23, 2026 · Brakes, Driver assistance · NY

Front camera malfunctioning causing errors ACC, LKAS, Collision mitigation problem, road departure problem, auto high beam problem

Filed Oct 15, 2026 · Driver assistance, Electrical · VA

I own a 2018 Honda Odyssey Touring. On May 29, 2026, I started the engine on my Odyssey and several dashboard system warnings appeared. The internet suggested having the battery tested and it was getting low, so I replaced the battery. The warning signs remained and caused several Honda Sensing safety and driver-assistance systems to become unavailable, including Adaptive Cruise Control (ACC), Lane Keeping Assist System (LKAS), Collision Mitigation Braking System (CMBS), Road Departure Mitigation, and Auto High Beams. Additionally, a Brake System warning appears on the dashboard. I have video recording of these warnings from when they first appeared in May. On September 2, 2026, the lights disappeared out of nowhere and all components worked. Later that same date, the lights were back and the components stopped working again. This happened again on October 13, 2026 - lights went off, then returned later in the day. The recurrent temporary reprieve from the lights makes me wonder if there is an electrical short in the rearview camera that controls those safety features. The diagnostics cost of this alone was going to be nearly $200. As numerous other similar complaints have been made to the federal safety agency, I am hoping this issue will be investigated and addressed - it is concerning that a single system failure is causing multiple safety features to be disabled - notwithstanding that is is difficult to know when to be worried about warning lights when the dashboard is full of them.

Filed Oct 15, 2026 · Driver assistance · OH

Vehicle: 2026 Honda Odyssey EX-L, VIN [XXX] (leased). My prior leased Odyssey (2025) was totaled on [XXX], when its Lane Keeping Assist malfunctioned at highway speed: the steering became unresponsive, the vehicle drifted out of lane, and it crashed into a concrete barrier. I filed the federal safety agency complaint 11744403 for that incident. That complaint also documented Adaptive Cruise Control surging and a dealer visit that found nothing wrong. This leased 2026 Odyssey has a recurring Adaptive Cruise Control defect. After stopping at a red light with ACC engaged, a light tap of the accelerator to resume has caused sudden unintended acceleration, followed by a loud beep, ACC disengagement, and loss of propulsion. This occurred [XXX] ([XXX], rush hour traffic) and [XXX] (about 5:01 PM, [XXX]). On [XXX], the forward collision warning repeatedly alerted to a vehicle ahead when no vehicle was present. I brought the vehicle to Honda of Cleveland Heights on September 9, 2026 to report these issues; the dealer was unable to reproduce or identify the problem. Sudden acceleration toward the slow-moving vehicle ahead and unexpected loss of propulsion in moving traffic are severe safety hazards. The defect spans two vehicles, which points to a systemic Honda Sensing issue rather than an isolated fault. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 14, 2026 · Driver assistance, Electrical · FL

Front radar/camera failure.All yellow ADAS warning lights turn on simultaneously (Lane Keeping Assist, Adaptive Cruise Control, Collision Mitigation Braking System, and Road Departure Mitigation). Problem has been confirmed by dealer. Safety is at risk by not having this crash prevention features on.

Filed Oct 14, 2026 · Driver assistance · CA

The forward monocular camera mounted on the windshield of the 2018 Honda Odyssey Elite failed, and this single point of failure turned off the Collision Mitigation Braking System, Lane Keeping Assist System, Road Departure Mitigation, and Adaptive Cruise Control. A majority of the safety and assist features of the vehicle no longer work.

Filed Oct 14, 2026 · Transmission · 55,000 miles · CA

The contact owns a 2020 Honda Odyssey. The contact stated that while coming to a stop, the vehicle independently shifted into Park (P). The contact stated that the check engine warning light initially illuminated before the vehicle automatically shifted into Park (P); however, the failure escalated, with the vehicle shifting into Park (P) and shutting off the engine entirely without warning light illumination. The vehicle was able to be restarted following the failure. Additionally, the collision warning light illuminated on the instrument panel, with no vehicles nearby. The vehicle was taken to a dealer. The failure mileage was 55,000.