Automatic Emergency Braking Problems of Honda Odyssey - part 1

The dtc u300-49 suddenly failed which affects many of the security systems on the 2019 Honda Odyssey. Upon research, this is very common on the Honda Odyssey caused by it overheating which seems like it should be a dangerous part. It is such an expensive part that we as the consumer have to replace and it should be Honda replacing it if it is their fault that this part fails often. I haven't replaced it as we don't have the funds to replace it, so hopefully it won't pose a safety threat as there are 5 warnings showing on my screen daily.

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Drove van about 30 miles and when I cranked it back up. It cranked fine but acc, lkas, auto headlights, and braking system warnings are on. Battery tests fine and camera and emblem is clean and working manner. Not sure whats causing it. Its annoying.

Sensor failed, causing many safety systems to fail - front collision warning, lane keeping assistance, lane departure warning, adaptive cruise control, etc.

Believe camera sensor in windshield or behind Honda emblem causing issues with 2019 ex-l model/ car will pop up 8 different codes ending with "transmission system problem" making vehicle unable to operate. In addition to transmission problem, it also turns off all safety features in vehicle. I have had numerous people complain about this problem as well. Can we please get this recalled and fixed??.

Vans forward collision warning and automatic emergency braking occurred when no vehicle was in-front of the van.

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This is a report on a design flaw- not a failed component- in the 2026 Honda Odyssey's "Smart" computer automated safety features, including automatic braking, lane departure, and forward collision warning systems. There have been two types of incidents. These incidents have been repeated on this vehicle dozens of times in our first year of ownership. These incidents are potentially very dangerous because they involve erroneous automatic braking at interstate highway speeds. Unexpected erroneous braking at interstate speeds is a good way to cause a rear-end collision or loss of control. 1. Automatic emergency braking due to erroneous lane departure detection. On interstates in arizona at highway speeds of 65 mph, the vehicle's lane departure detection system throws erroneous warnings when it sees non-lane markings on the roadway, such as tar sealant strips or seams between pavement sections. This has resulted more than once in the vehicle erroneously applying emergency automated braking to slow the vehicle. This happens even when lane assist and adaptive cruise control are turned off by the driver. 2. Erroneous automated braking while overtaking another vehicle. On interstates in arizona at highway speeds of 65 mph, while passing in the left lane a vehicle that is moving much slower in the right lane (e. G. Semi truck climbing a hill at 40 mph), while using adaptive cruise control, automated braking is applied erroneously when there is no risk of a forward collision. The automated braking tends to kick in far earlier than a human driver would brake, and when there is no vehicle in the lane ahead, so it is unexpected and dangerous. This only happens while adaptive cruise control is activated by the driver.

On three separate occasions — may 17, may 20, and may 29, 2026 — the vehicle's automatic emergency braking (aeb) / collision mitigation braking system activated without cause while traveling at highway speed (one of these occasions was on an interstate). On each occasion, no vehicles, pedestrians, or obstructions were present ahead of or around the vehicle. The road was clear. The activation produced a large bright yellow dash notification and the vehicle's brakes activated. Minor children were passengers in the vehicle during these events. The vehicle has an active florida lemon law case with multiple prior documented electrical nonconformities. When I attempted to schedule yet another service appointment to have this defect diagnosed, the dealer, who sold me the vehicle, refused to service the vehicle due to the pending lemon law status and directed me to contact Honda corporate. When I asked the dealer to provide their refusal and the requirement for corporate authorization in writing, they declined to do so. Honda corporate has not responded in over 72 hours. Photo and video evidence of other nonconformities is available.

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Forward collision mitigation system displays an error message and does not function. This has been replaced once and continues to fail. The car also turns off at stop lights with the fuel saving automatic restart system, but will not automatically restart.

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Cmbs error again now having lane assist error.

The contact owns a 2022 Honda Odyssey. The contact stated that while driving on the highway at approximately 40 mph, the collision mitigation braking system engaged erroneously. The dealer was contacted; however, the vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 51,250.

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When accelerating from a stop position while pushing on the accelerator the vehicle will not move. Takes a couple seconds. Almost struck by oncoming car when attempting to turn left onto main road. Happens frequently. Next: left sliding passenger door doesn’t close all the way then opens back up. Takes several attempts before it decides to close or with my assistance. Third: rear cargo door shuts without me pushing the button. Alarm sounds and immediately shuts. Been hit in the head once while closing. I’ve seen complaints about this and Honda is apparently aware. Last; the car will inadvertently emergency brake when an oncoming vehicle approaches from the front. Very disturbing when traveling at any speed going into an instant stoppage.

While driving the vehicle under normal conditions, multiple advanced driver assistance and safety systems suddenly became unavailable without warning. The systems affected include automatic emergency braking, forward collision warning, lane keeping assistance, and related safety features that rely on the forward-facing camera. The failures occurred at the same time and were indicated by warning messages displayed on the instrument panel. The vehicle was inspected by an authorized dealer, who confirmed a diagnostic trouble code indicating an internal electronic failure of the forward multipurpose camera. The failed component is installed behind the windshield and is available for inspection upon request. The dealer stated that no accident, physical damage, misuse, or external cause was identified. After the camera failure was identified, the vehicle also briefly displayed a transmission system warning message that later cleared on its own. In addition, the center display screen has shown unstable behavior while driving, including unexpected resets and flashing back to the navigation screen. The sudden loss of collision mitigation, lane assistance, and warning systems reduces the vehicle’s ability to assist in avoiding crashes, particularly in emergency situations, and increases safety risk to the driver, passengers, and others on the road.

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My car has started breaking randomly without reason. Just a few days ago it slammed on the brakes. I was driving on the interstate and went around a bend, and my car slammed on the breaks. I. Talking from 70- 5mph in seconds. I didn't have time to do anything. Nothing in front of me, nothing on the side. The car behind me had to swerve into the median to avoid hitting me. My car almost caused an accident. Im honestly afraid to drive it. Im not sure if the radar system is an issue in other Hondas, but if I was in an accident it would have been my fault. If the person behind me wasn't paying attention my children could have been seriously injured or worse. Please look into this issue. Its more dangerous than the other recalls.

Hello I am reporting a safety concern involving a 2022 Honda Odyssey ex-l that was involved in an accident and declared a total loss. During the incident, I was driving in snowy conditions at approximately 50 mph while entering a split lane. The vehicle began to skid, and shortly afterward I observed warning indicators activating. It appeared that vehicle safety systems, including stability or braking systems, engaged automatically. Over the next several seconds, I attempted to regain control by applying the brakes multiple times and making steering corrections. However, the vehicle did not respond as expected. Despite these inputs, the vehicle continued toward the shoulder and ultimately impacted a barrier. I was unable to regain effective steering control during this period. This raises concern about the behavior and response of vehicle safety systems, including abs (anti-lock braking system), vehicle stability assist (vsa), and related driver-assist features during loss-of-traction conditions. Additionally, I became aware of a recall affecting similar model years related to unintended or improper curtain airbag deployment due to system sensitivity. Given that my vehicle falls within this model range, I believe it is important to evaluate whether system behavior may have contributed to the incident. I am requesting that this incident be reviewed as a potential safety issue and considered alongside similar reports to determine whether further investigation is warranted.

I was commuting home, about 30 minutes into the drive, all of the dashboard and radio went blank for a few seconds. It came back on and the break light, anit-collision, lane departure, lights were all flashing. It did this 2 more times in the over the next 5 minutes. I was concerned for my safety because I wasn't sure if my breaks and all the other things were working propoerly. I didn't know how fast I was going or if my car was going to stall on the highway. I see that a recall was issued by Honda yesertday, not for my car model, but a similar issue (a software bug can cause the instrument panel and rear-view camera to go blank). It has not yet been inspected by a repair person. There wre not any warning lights prior to this happening.

The car has started giving warnings every time I turn it on (as of 6 months ago): adaptive cruise control problem, collision mitigation system problem, auto high beam problem, lane keeping assist problem. It seems there must be a fault in the windshield camera that renders all these safety features useless. The repair shop stated that windshield camera isn’t working and is a $2k or more to repair. I am now driving a minivan that doesn’t have many important safety features and this is very dangerous.

The multipurpose camera unit failed causing the forward collision warning, automatic braking, lane keeping assistance, and lane departure warnings lights to come on and rendering all those systems inoperable. Part of the selling point of this vehicle is these additional safety features and for them to fail within 5 years of owning the vehicle is a safety concern. From my own research online, it seems this is a common problem for Odysseys built around this timeframe. This part is extremely expensive and is a required repair if you want the original safety features for the vehicle. I made the repairs, but the life of these units is something that should be looked into.

Adas system, camera behind windshield. Multiple safety systems malfunctioning Honda sense with all adas safety features are not working and risk the emergency braking system to engage without reason. Caliber collison and protech have diagnosed and confirmed the problem. Honda service has confirmed no recall no warranty coverage. Quoted 2500 to fix no prior warning lights or messages. Multiple dash lights occurred suddenly and never went away.

While changing lanes to an off-ramp the collision mitigation braking system suddenly activated along with a collision warning beep even though there were no automobiles nearby to trigger the warning. No cars in front of me and no cars to the right of me in the exit lane. My car immediately braked and tried to steer back into the main roadway, away from the exit lane. The lane departure light did also come on due to me not using a turn signal prior to the lane change, but there was nothing else around to trigger a proximity alert nor to respond to.

Multiple Honda sensing safety systems (collision mitigation, lane keeping, road departure, adaptive cruise, and auto high?beam) disabled suddenly on 2020 Honda Odyssey ex?l around 76,000 mi. Dealer and two independent diagnostics confirmed dtc u3000?49, internal electronic failure of the forward recognition camera. The fault disables all automatic braking and lane?keeping functions. Battery voltage and calibration verified ok; component failure is internal. Honda quoted ~$2,000 repair. This is a significant safety risk since all advertised crash?avoidance functions stop working.

**vehicle:** 2019 Honda Odyssey **components affected:** forward collision avoidance, lane departure, adaptive cruise control, braking system, exterior lighting, electrical system, instrument cluster **complaint summary:** multiple safety systems on my 2019 Honda Odyssey have simultaneously failed, including lkas, acc, collision mitigation braking system, auto high-beam headlights, and other driver-assist features. The dashboard displays warnings for nearly every safety-related system, and the vehicle disables these features without warning. **detailed description of the problem:** whenever I start my vehicle, multiple error messages are displayed related to the lane keeping assist system (lkas), adaptive cruise control (acc), collision mitigation braking system (cmbs), road departure mitigation, auto headlights, and other safety features. These warnings appear together and persist even after restarting the vehicle. Apparently, this issue is widespread among 2018–2020 Honda Odyssey owners, with many reporting the same cluster of system failures. The problem appears to be related to a malfunction in the vehicle’s electrical system, sensors, or control modules. In my case, the failures occur without any external damage, weather event, or driver action that would explain the sudden loss of safety functionality. When these systems fail, the vehicle disables critical safety features such as automatic emergency braking, lane keeping, adaptive cruise control, and automatic headlights. This creates a significant safety risk, especially at highway speeds or in low?visibility conditions. **frequency:** the issue occurs whenever the vehicle is started, affecting my driving everyday.

Since purchasing this vehicle brand new off the truck, we have had it back at the dealership multiple times ,we've taken it for the plug in console not working for firesticks, a sensor not working on the passenger side door and claiming it to be open, the sliding door not working correctly, the doors locking and refusing to unlock, battery draining, ac not working, stalling, dying at lights, slamming on its own brakes with nothing around, transmission acting weird, it putting itself in to sport mode, transmission sticking, doors not unlocking or not locking, sensors going off, random errors on dash, screens not working, car play not working, suspension popping, steering being wiggly and loose, brakes squeeling. Today we were told by the dealership "he saw the damage that is resulting in needing to replace the steering column. With that being said, it is considered a safety hazard to drive this vehicle with the condition the steering column is in. " this is after multiple times of saying nothing is wrong to we have to charge the battery to you need a new starter to this.

The cmbs braking system is completely faulty. It regularly brakes for shadows on the ground, going up hills, or for no reason at all. There have been several near misses where cars behind me have almost rear ended me because of this cars erratic braking. I have a neck injury from this most recent episode of the car slamming the brakes for no reason.

We turned the car on and got an acc, lkas, fcs, ahl errors due to the front sensor and the camera failing. This is an issue that many Honda owners are dealing with. The issue will not allow you to use cruise control and will disable 90% of the safety features we bought this vehicle for. The car drives fine but the safety of those in the car is affected by this error and needs to be recalled due to the number of complaints of this issue. There were no errors or warning signs prior to this happening.

I own a 2019 Honda Odyssey elite with 39,000 miles on it. In January 2026, suddenly I had multiple warning lights on in my minivan related to an adas system failure. I replaced the car battery and later determined that the adas camera had failed in the car. In reading online, this is a very common issue with Hondas as the cameras are known to overheat and require replacement. Warning lights: brake system malfunction, adaptive cruise control problem, collision mitigation system problem, lane keeping assist problem, road departure mitigation system problem, auto high beam problem before I was able to get it repaired, the van turned off suddenly in traffic twice while my wife was driving the car while also one of my children was inside, creating an unsafe condition that could have created an accident. Luckily my wife was able to get the car safely moved out of traffic and we stopped driving the car at that point. I wound up replacing the camera and and needing to get it recalibrated so that the car could be drivable. This resulted in the van not being operable for nearly a month. For a car that had 39,000 miles on it, this really should be something under a longer warranty as it could have created an unsafe driving condition for my family. Total cost to repair = $1634. 22.

The front camera that is responsible for adas suddenly died and it is very vurnerable to heat. The unit gets very hot and it gets hot quickly. The lifespan of the unit is very short and the dealer is asking for $2000 to replace it like they have seen this pretty often.

I reported issues regarding egress failure and children stuck within the back seat of the van, electronic dashboard failing while driving, and no start issues amongst others (11709419). Previously the certified dealer stated the issues just could not be reproduced, despite my videos, however, today they stated a Honda admin level director showed and told them the issues are being reported by others, they dont know how to fix it, and I need to come get my car, continue driving it.

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My 2023 Honda Odyssey elite has recurring, intermittent safety-related malfunctions across multiple systems. The most serious issues are: (1) door lock/unlock and rear door opening failures preventing emergency egress (children trapped), (2) intermittent “no-start/no-response” where push-button start does nothing (no click/no crank and sometimes no lights/electrical response), and (3) intermittent dashboard/instrument/electrical abnormalities while driving. I also previously experienced dangerous driver-assist behavior including unintended automatic braking and lane/steering behavior in construction zones. Door/egress: rear doors sometimes will not open from inside or outside even when the vehicle audibly indicates it unlocked. I have video of my children unable to exit the back seat. This is an emergency egress hazard. No-start/no-response: multiple events where the vehicle appears electrically dead and will not start, then after waiting ~10–30 minutes it starts without a jump. Stranding hazard. Recent examples: 12/31/2025 – doors would not open initially; after entry, no lights/electrical and start button produced zero response; after ~10–20 minutes it started. 01/05/2026 – while driving, dashboard/instrument display went off; buzzing noise believed hvac related occurred. 01/05/2026 – after parking at costco, vehicle again would not start (zero response); after ~30 minutes it started. 01/06/2026 – locking/unlocking malfunction again; rear doors would not open despite audible unlock (video). Repair history: authorized Honda dealer (bell road Honda) previously stated “cannot reproduce,” replaced dvd/recall items and performed a “reset,” but did not diagnose root cause; problems returned worse. Honda customer service case opened. Injuries: prior unintended automatic braking event (reported around 08/29/2023) caused injury (my legs hit dash; child had marks from car seat) and near rear-end collisions. Request: investigate potential safety defects.

When driving with or without the cruise the word brake appears and the van taps it breaks automatically even when there is no reason to do so. There is no vehicle in front or anything on the road to be detected. It occasionally happens when there is a vehicle in the oncoming lane, but happens more often when there are no other vehicles close enough to be detected or cause me to need to slow down. It has been happening for some time now, but I did not know how to report it.

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The multipurpose camera module has failed, on the vehicle resulting in the simultaneous loss of several driver-assistance and safety systems while the vehicle is in operation. These systems include cruise control, lane keep assist, lane departure warning, collision mitigation, automatic high beams, and the brake system warning. Upon inspection, there appears to be overheating within the camera module. This overheating has caused visible discoloration both inside and outside the module housing. Based on these observations, I believe the condition may present a potential fire hazard. Additionally, the plastic cover mounted to the windshield becomes extremely hot to the touch, creating a risk of skin burns if it is accidentally contacted. This malfunction poses a significant safety concern for my family. If the camera fails while driving, the vehicle’s safety systems may not function as intended, increasing the risk of an accident. All of the failures chime in one after another displaying a problem with the malfunctioning components stated earlier in the text. Furthermore, if a driver is deaf or not actively monitoring the instrument panel or speedometer, they may not hear or immediately notice the warning alerts indicating that these systems are no longer functioning. The issue has been diagnosed by my local repair shop finding error code u3000-camera/radar internal failure. Repair requires replacement of the multipurpose camera module, with an estimated cost exceeding $2,000 in parts and labor, which represents a significant financial burden.

Honda sensing stopped working and threw a bunch of errors about acc, lkas, collision mitigation, auto high beam error, forward collision, lane keep. Apparently the camera had an internal fault without any prior warning. Also vehicle’s timing belt tensioner already deemed leaking at just 75,000 miles, well below the 100k replacement point, despite regular checks and maintenance at Honda dealers. Front suspension leaking, Honda replaced only 1, and declined to replace both, as recommended by dealer mechanic. If I did not have Honda care, I would be left with a very large repair bill for critical components of the drivability and safety of the vehicle. This is not acceptable.

Suddenly one day in the morning taking my car from my garage, all alarms in my board turned on and stopped working: automatic emergency braking, blind spot warning, forward and collision warning, lane departure warning, lane keeping assistance and rear cross traffic warning. I bring my car to the mclarty Honda service in little rock, ar. After calibration showed that I need a new multipurpose camera code u 3000-49. This is major concern for me. My van is in perfect shape, only 7 years old not so many miles. Doing some research sounds like this is an issue with Honda vehicles. My neighborhood is full of kids ( I have 3 kids too)with these large vehicles you can find a lot of blinds spots and these features help to keep everybody safe. I believe this a safety issue that need to be recalled in Honda's cars.

All of the alarm lights are going on at once, immediately when the car is turned on. This includes the collision mitigation system problem, adaptive cruise control system, lane keeping assist system (lkas), break system. I am told by my local garage that it is a Odyssey radar system failure, that probably originates in the camera or computer, but that they cannot fix it or get parts for it. It is unclear if these systems work or not.

The windshield monocular camera failed, disabling all safety precautions.

All of the warning lights shows up on the dash board. Honda told me it’s related to a bad multi purpose camera. None of the safety features or cruise control will work until the camera is fixed.