Warnings Problems of Honda Odyssey - part 1

I was driving down a 35mph road, the car in front of me slowed down, I was about 2 car lengths behind it. No notice, no warning, my Odyssey slammed on the brakes and brought me to an abrupt stop with no notice and no need. Everything in the van flew forward and in the floor. Luckily there was no one directly behind me. It gives me serious whiplash when this happens and it is uncalled for, the car in front of me did not stop it only slowed down, there was plenty of room between our vehicles (we were only going about 30 mph) and there was absolutely no warning- just bam! and my van was stopped in the middle of the road. Something needs to be done about this, someone is going to be killed! I took it to the dealer the last time and they said the van did not record it. So another easy out for Honda! and nothing they can do. . .

Multipurpose camera is defective- broken after only 80,000 miles. No longer functions at all. No automatic emergency braking, no forward collision warning, no lane departure warning, no lane keeping assistance, no adaptive cruise control. Dangerous now without all those computer controlled safety functions. $2400 replacement. I don’t have $2400.

See all problems of the 2020 Honda Odyssey 🔎.

Forward camera issue. Brake system light turns on and cruise control, forward brake warning, and lkas all stop working.

See all problems of the 2018 Honda Odyssey 🔎.

The vehicle started to have failing sensors all of a sudden. I tried a new battery but the codes returned. All adas systems tied to the camera module all went out. I had 5-7 warning lights for all driving functions. Additionally the seat belt buckle is not always clicking in properly. The belt about half the time is not retained in the buckle section.

While driving in normal traffic, when I come to a complete stop and keep my foot on the brake, the auto idle stop system activates as designed. However, when I release the brake to continue driving, the engine intermittently fails to restart properly. Instead, it repeatedly attempts to restart, cycling on and off several times before shutting down completely. When this occurs, the vehicle becomes disabled in traffic and does not respond as expected. It can take multiple attempts and a significant amount of time before the engine finally restarts, leaving me stranded in intersections or in moving traffic. This creates a serious safety hazard because surrounding vehicles continue moving while my vehicle is unable to move. This problem has occurred multiple times under normal driving conditions and is not an isolated incident. During one occurrence, the vehicle failed to restart after the auto idle stop system activated, leaving my vehicle disabled in traffic. As a result of this incident, my vehicle was involved in a collision that **damaged the front and back bumper**. Fortunately, no one was seriously injured, but the incident clearly demonstrates the significant safety risk associated with this defect. The vehicle is currently at an authorized Honda dealership for diagnosis and repair. I am submitting this complaint because a vehicle that unexpectedly shuts down and fails to restart after auto idle stop activation presents a serious safety hazard. I am concerned that this defect could lead to additional crashes, property damage, or serious injuries if it is not corrected.

See all problems of the 2024 Honda Odyssey 🔎.

I was driving on the street about 15 miles per hour when the car sensor sensed something in front of my car and stopped automatically when there was nothing in front of me. Almost caused a rear-end accident, luckily, the car behind was able to stop.

See all problems of the 2025 Honda Odyssey 🔎.

The vehicle is showing persistent electrical and communication fault codes involving the ecm, abs, and eps systems, including p16e2, p16e5, p16e7, p16e8, u0401, and u0416. These codes return immediately, which suggests an active fault rather than a temporary low-voltage condition. The issue appears to involve the battery sensor and/or the related communication network between control modules. Because the faults involve abs and eps communication, the concern is that braking-related or steering-assist systems may not be receiving correct data. This creates a potential safety risk because the vehicle may experience intermittent or unreliable control-module communication, which could affect steering assist, braking-related warnings, or overall drivability. The warning lights and diagnostic codes first appeared before the vehicle was put back into normal use and have continued to remain present. The problem has been reproducible because the codes reappear right away after being cleared. No dealer or manufacturer diagnosis has been confirmed yet, so the exact root cause remains unresolved.

See all problems of the 2019 Honda Odyssey 🔎.

When those error codes appear, those safety features become unavailable during driving. These error usually come up when I just start the car.

Monocular camera code set and several dash messages - failure of acc, fcw, lka.

On interstate 65 4/4/2026 during light traffic, after a rain storm, however with no rain currently occuring, our vehicle experienced an event where the collision avoidance system dropped out speed from 70 miles an hour to 35, nearly causing a rear end clission with a vehicle behind us. The dashboard made no indication of any occurance, and the breaking seemed to occur with no indicator of there being anyting in front of us at the time of the incident. This has occured before however after rainstorms, and while attempting to make left hand turns. This however was the first incident in which it clearly caused a near miss collision event.

While driving on a clear road, with or without heavy traffic, the collision mitigation warning shows up on the dashboard display. Sometimes the warning for the collision system goes off and the system tries to brake and jerk the wheel. If I have the wheel firmly I can correct it and it resolves. It can happen on a clear road with no one around or in heavy traffic. Yesterday it happened in a single lane with barriers on both sides, a road around logan airport in boston, with no vehicles ahead of me. The car tried to steer me into the barrier. I was doing less than 25 mph. The warning had been going off for a while but now that the steering and braking are involved it’s much more serious. I reported it to the dealer. They said they did a system check and couldn’t find a fault. The braking and steering problem first occurred about a month ago. The warning by itself has been happening intermittently for over a year. This happens even when the collision mitigation system is turned off. This is a terribly unsafe issue. If my wife had been driving I don’t know if she could have corrected. Please act and issue a recall!.

The multipurpose camera failed. Searches online and discussion with the dealers show this is a common problem. Result is shutdown of collision mitigation systems, blind spot indicators, lane divergence system, auto high beam, etc.

The forward collision prevention system engages the brakes when nothing/no one is in front of us. It will also engage the lane departure warning, which also engages the brakes, when construction zones remove the actual lane lines and temporary lines are put down. The car gets confused and brakes the car to a stop in the middle of a highway.

See all problems of the 2021 Honda Odyssey 🔎.

After being on idle on a stop light, when releasing the brake to go, warning on dash says "collision mitigation warning" when nothing hit the car and I'm there's enough distance with the car in front and behind. The severity has increased now, after being idle, when releasing the brake, it now completely shuts off, dash says "shift to park", and can't go, unless I push the ignition button. Took it 3x for the same errors on dash, Honda said the 1st time it was low battery, battery was running on low juice and didnt have power to come back from idle, they changed the battery. Now they say they need to replace the starter after few thou$and$. I see online this happening to others too. I fear the car behind me, may rear end me, because I can't go, green light is on, but I can't move as I'm re-starting the vehicle after being on idle. Honda says my VIN is not part of the bad batch. It's happening more frequently and Honda said they were able to replicate.

Upon further investigation, lots of 2018 Honda Odysseys are experiencing the same problem I am. There is a leak coming in from the top of the van in the rear that causes water to leak through and overtime damages the control unit in the back. Damage to this causes my power lift gate to completely stop working, my passenger drive door to stop working, and a bunch of features like the front collision warning, the lane departure, sensors, fog lights, so on to fail and go on and off. I had problems here and there with it but it wasn’t until it rained 4 days straight that I made the connection with the leak and started trying to figure out the problem. I took it to the Honda dealership to get diagnosed and they confirmed this problem. We have not been in any accidents to cause body damage to the vehicle.

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.

The front camera behind the rear view mirror comes up with code and the cruise control will not work and the lane departure system and the forward collision system and adaptive cruise control. The front camera issue can only be repaired by replacing the camera between 800 and 1500 cost to purchase the camera plus a 5 to $700 adas aiming at the dealership and I don't feel that that's correct being that almost every single Honda Odyssey I've touched in my repair shop from 2018 till current has this code coming up. Sometimes I can put a scan tool on the vehicle and clear out the code and do a dynamic aim and the vehicle will correct itself but it will come back relatively quickly and sometimes it's impossible and the camera needs to be changed before anything can be done and all of those systems are deactivated until the front forward facing camera has been replaced. I am a mechanic I service a lot of these Honda Odysseys I have a list of items that I find almost every single one has a problem with this particular vehicle I'm sending in about is my personal vehicle and it has had numerous issues that had nothing to do with the operators of the vehicle solely to do with quality of the vehicle front camera is one the sliding door cable housing collapsing too the rear shocks snapping apart at under 50,000 miles front strut mounts going bad at 60,000 miles. There's also an issue with the driver's seat belts fraying in my car in particular frayed in under 12,000 miles more troubling is that every customer I send to the dealer to get things repaired under warranty comes back weather repaired or not without a single item being recorded by the dealer invariably what ends up happening is the dealer will reset some parameter and make the message or error go away. They will then return the car without any documentation stating anything. Once the customer brings it back after warranty is up the dealer charges to replace a repair because the customer has no proof of prior complaint.

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.

Warning lights stay on for: adaptive cruise control problem (acc); auto high-beam problem (a); road departure mitigation system problem; collision mitigation system problem; lane keeping assist problem (lkas); brake system lights. Lights will not clear. Dealership diagnosed for replacing monocular camera on front windshield/mirror. Gary smith Honda replacement cost $2364 on 20jan2026.

Front camera is known to go out on these vans causing acc, lkas, collision mitigation, road departure mitigation system, auto high beam, transmission problems and more.

Went to pull into parking lot, adas system starting going crazy. Throws transmission malfunction error. Headlights won’t work - they turn on and off or go extremely dim. Van keeps jerking and losing power. Code reader showed u3000-49 electronic failure. Van drove normal, no issues until this code popped up. Issue started 01/08/2026.

After purchasing my 2020 Honda Odyssey ex-l in July 2025 (had approximately 58,000 miles), in January 2026 (current mileage approximately 66,000 miles), it suddenly displayed multiple indicators on the dash, including 'acc', 'lkas', 'brake system', 'auto high beam problem', and 'collision mitigation'. My local mechanic indicated the cause was the collision radar system, but it needed to be calibrated at a Honda dealership. My local Honda dealership indicated the problem code as 'u3000-49 internal camera malfunction', necessitating that the multi-purpose camera be replaced. The total repair cost was $2,104. 99. Online research shows that this is a common issue with this model year. If the cause is due to a camera malfunction or disrepair, and it impacts the safety of myself and others in the vehicle, why is this not considered a valid reason for a recall? I shouldn't be responsible for a costly repair that didn't result from any mechanical issue or mistreatment on my part. Because of the safety implications, this should be a Honda recall, and I should be reimbursed for the repair cost.

My multi-purpose camera system has gone bad after only 5 years. Collision mitigation, cruise control, brake system, lane keep assist, among other safety features are failing because of this.

In December, out of the blue suddenly had rotating list of warning on dash panel (lane keeping assist problem, collision mitigation system, departure mitigation system problem, auto high-beam problem, adaptive cruise control problem) plus brake warning system light is on constantly and brake hold not working. At first this was intermittent but now on constantly when starting and driving car. Only 55k miles on my Odyssey. Dealer said he had 3 of these in the last three months. Said it was multi purpose front camera failure. Cost over $1500. Since huge safety issue putting not only my family but other cars/people at risk, we are paying to repair, however we just found hundreds of people complaining about this same issue. This should be a Honda recall. We did nothing wrong to cause this safety issue and this part should not fail in 5 years. I don't have the final invoice yet but I can upload later if required.

The front right sensor goes off randomly. Sometimes all day long for days, then nothing for a week or 2 then back to it. Various lengths of time, usually stressfully long times, with nothing aroundcausing stress and making fucus hard. It started a few months after getting the van. We cleaned it, had the dealer inspect it and no one has ever figured out why we have to live with this blaring warning alarm. The dash says object warning with it and if I close that out nothing stops the alarm but putting it in park which I can't do on the interstate or in pickup line at school.

See all problems of the 2023 Honda Odyssey 🔎.

After researching I find it to be a sensor in the windshield is a common problem.

The multipurpose camera unit has failed resulting in loss of adaptive cruise control, lane keep assist, automatic braking and other features related to the mcu. There are approximately 6 warnings when starting the car of features not working, and 3 lights that remain lit on the dash including "brake system". This is the second time this issue has arise. The first time was replaced by the dealer under warranty.

While driving with my family, my vehicle experienced a sudden and total failure of the front-facing multi-purpose camera mounted behind the windshield. This component is the primary sensor for the Honda sensing suite. The failure caused multiple critical safety systems to become inoperative simultaneously, including the collision mitigation braking system (cmbs), lane keeping assist (lkas), and adaptive cruise control (acc). These systems are essential for crash avoidance and driver assistance.

On November 12, I was on the highway in the right lane, there was a car about 4 car lengths ahead of me in my lane and the car in the middle lane was quite a distance ahead. Just as I got in the middle lane, boom! the vehicle's cmbs malfunctioned and slammed on the brakes - no warning, visual or audible, just came to an abrupt stop. Thank goodness no one was behind me or I would have been dead. It was an instant whiplash effect as well and then as I was then merging back into the right lane to exit the highway, it did it again! there were no cars anywhere near me as I had slowed down due to the trauma from the first braking malfunction and all the cars were quite a distance ahead and thank goodness there were no cars behind me. Then on November 25, the same thing happened again. Driving down the highway, no cars near and boom! I am brought to an abrupt stop in the middle of the highway! the cmbs malfunctioned again in the middle of the highway. I took it to the dealer and conveniently there were no codes so they said there was nothing they could do. Someone needs to do something about this! to answer your questions 1) cmbs system is malfunctioning and has been for quite some time on Honda vehicles 2) if there would have been a vehicle behind me, I most likely would have been killed. If my dogs would have been in the van, they would have been injured. It gave me whiplash 3) I took it in and they did nothing until I complained, then they kept it a second day and drove it and said it didn't do it. But they weren't even going to do anything until I pushed the issue. This is a known issue with Honda as I found out after it happened to me. 4) the dealer 5) absolutely no warnings before it happened.

Since November 2025, multiple safety warning lights have illuminated upon starting the vehicle, indicating malfunctions within the forward collision warning, adaptive cruise control, and lane keeping assist systems. Two separate dealerships, reseda Honda and woodland hills Honda, conducted independent diagnostic tests. Both service centers confirmed the root cause is an internal failure of the front multipurpose camera. Consequently, the vehicle has lost critical active safety features, leaving the occupants unprotected and significantly compromising the vehicle's safety on the road.

One light on dashboard lit up, started as "blind spot info system problem", light would go on and off for couple of years. Now every light on dashboard lights up, including lane assist, blind spot infor system problem, forward collision warning, adaptive cruise control problem, rear cross traffic warning, lane departure warning.

Driving on the interstate with cruise control. All of a sudden the car braked (no one in front within eye shot) and cruise control stopped. I had to tap the brake manually then accelerator to get the car back under my control. Ever since then I get acc, lkas and other warnings when the car starts up. It seems like the front camera catastrophically failed while driving and almost caused the car to come to a complete stop on the interstate. It was very scary.

All the systems are not working this is a very low mileage vehicle and has not been involved in any accidents. They are many owners reporting the same issue. This is a safety issue as it shuts off many of the safety features of this vehicle while driving. Honda claims it’s normal.

Started up the van and the following appears on the dash: acc problem collision mitigation problem lake keep assist problem auto high beam problem safety features unavailable when driving vehicle. In my research this issue has occurred with other owners of the vehicle as well.