Warning problems of the 2020 Honda Odyssey - part 1

On 5/28/26, I went to get my van checked at a repair shop through my healthcar warranty and I was told that I needed a system update on my brake system/adas/lkas/acc systems. All the lights beeped and were lighting up on my dash. It would go on and off from time to time, usually when it was more hot out. They told me to take to dealership and they need to do a system update and should fix no additional charge. I took it to the Honda dealership service department on 7/6/26 and was told it is the multipurpose camera has an internal failure and it would cost me $2,443. 00 to repair it, plus I had to pay them a diagnostic fee. I have researched and been told by other repairs shops that this problem has been occurring often and it seems due to heat is the reason this happens.

My van is suddenly giving me warnings that include collision mitigation, road departure mitigation, adaptive cruise control, lane-keep assist, brake hold system, and traffic sign recognition. My safety is at risk if the front camera system is not working/faulty. I was unaware of the problem and had my cruise control on when it just went off and there were warnings popping up on dashboard. There was a class action lawsuit filed against Honda on 7/2/26 in CA for certain Honda vehicles. I have had my van put on a computer that has given us the error code and is a front camera failure. The issue first appeared on 7/2/26. It will suddenly start flashing warnings when I’m driving. It will also flash warnings right after I start the vehicle.

The forward facing adas camera has been reporting u0104 error. This resulted in many advanced safety features failing, including adaptive cruise control, automatic emergency braking, forward collision warning, and lane departure warnings. The problem was confirmed and repaired by a independent service center. The problem first appeared on June of 2026.

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.

Front camera is bad or faulty, triggering all adaptive cruise control, lane keep assist, auto high beam etc errors on dashboard, rendering the car not able to start or die in the middle of the road/traffic when the engine goes into idle mode while stopping at red lights. My odessey has over 111k miles when these issues start showing, but lots of people report experiencing same issue with even with their newer odessey. It doesn’t feel right why Honda installed cheap cameras especially when it plays a crucial role involves safety of the car and the driver.

I believe the forward facing camera is having electrical issues which is causing the vehicle not to engage lane departure, traction control, lane keeping assistance, emergency braking, adaptive cruise control, ac intermittently blowing warm and cold. There are four or five lights on the dash about this.

System failure for all of the safety-related assistants. Works intermittently, but mostly indicates failure.

Getting error code for safety sinsing. Lane keep assist, collision mitigation system and now transmission system. Forward facing camera is cause of issue.

The adas system doesn't work. The forward collision system, adaptive speed control, and lane keeping assist have all shown malfunction errors and no longer work.

The front windshield camera completely failed. No longer have emergency braking. Honda said known problem and want to charge $2000 to fix.

System is starting to fail by alerting me to clean windshield. Windshield and camera have been cleaned, still getting multiple warnings that system is shutting off safety features during my commutes.

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

All of my adas systems were disabled due to a water leak. The repair required the dealership to hire a "leak doctor" and then replace a module in the rear tailgate. My vehicle showed an alert on the dash that each of the adas features were disabled, auto high beams were disabled, and I could not turn the vehicle off by pushing the start/stop button once, I had to use a procedure that forced the vehicle to shut down. My interior dash lights flickered, I'm not sure if the headlights worked. As the interior dried out, the flickering occurred less frequently. I was able to drive the vehicle to a Honda dealer for repairs.

The front camera that regulates the adaptive cruise control failed. Now it does not allow for any of the safety features to work. I’ve gone on multiple Honda forums and a lot of people have the same issue.

On Sunday 9/28/2025 I started up my vehicle and received numerous error messages: collision mitigation braking system (cmbs) road departure mitigation system (rdm) lane keeping assist system (lkas) adaptive cruise control (acc) brake system light I contacted the dealership in which I purchased the vehicle and they did diagnostics. It came back that the front facing camera needs to be replaced. Which is a $2000 repair. After researching online this seems to be a common issue with years 2018-2020 Odysseys. This needs to be investigated and a recall issued from Honda USA for remedy as these error messages are concerning when they pop up repeatedly.

The forward facing camera failed on my 2020 Odyssey with only 90,000 miles. Because of this failure, I am loosing all my forward facing safety features. This seems to be a common issue across many Honda vehicles and most users report being told the issue is being caused by overheating. Since users are being told this is a cause and effect issue, the manufacturer should address this at their expense. I first noticed this issue in mid September 2025.

I’m have had trouble with the infotainment center since less than 5,000 miles. Supposedly it was fixed during a recall. I still have issues with it. Shortly after the recall was done, I started having all kinds of dash lights come on. Transmission system problems, adaptive cruise control problems, lane assist problem, emergency breaking problems, forward collision problems, and so on. All together, they are about 7 different lights. The rear air/heat no longer work at all. Every so often, I crank it and the radio is black. Won’t work unless I restart the car. Auto headlights no longer work. Side mirrors no longer adjust. Sunroof will no longer open. Interior lights don’t work. Automatic doors and trunk lift do not work. I can’t even lock the van anymore. When I crank it, I have to hold the key fob on the ignition button and press 3 or more times before it cranks. Switch batteries in the key fob and still no different. I paid a lot of money for this van after never having one issue out of my 2014 Odyssey. The 2020 has been nothing but a nightmare since a month after I purchased it. I will never buy or recommend a Honda vehicle to anyone. In fact, I will discourage anyone who tells me they’re thinking about a Honda purchase. I am now stuck with a barely working vehicle because who can afford another car in this economy?.

The camera sensor is malfunctioning. It is affecting the collision sensor and lane assist sensor. Also adaptive cruise control, road mitigation and auto high beams. My vehicle is scheduled for diagnostics with a dealer, but seeing the many, many cases and videos online of the same problem, I am certain of the problem since it has been confirmed by others who have already paid for this costly repair. My warning lamps come on every time I start my vehicle. This is a definite safety issue since the issue is with the safety sensors.

All warning lights came on for adaptive cruise control, automatic emergency braking, forward collision warning, lane departure warning, and lane keeping assistance. Based on my research, it seems the forward facing camera has failed. The vehicle only has 37,000 miles on it and it is only 5 years old.

The forward-facing camera and/or radar unit failed one morning while running errands, resulting in 5 separate adas system failures. With these safety features not working, our safety and the safety of others is at risk. We took it to our dealer and were told we would have to pay a diagnostic fee of $205, even though they clearly already knew what the problem was- based on the multiple complaints through NHTSA and various other forums and websites from Odyssey and other Honda model owners and across multiple years. The problem was confirmed by the dealer and they quoted us $2025 and we're still not sure if that includes just the camera and/or the radar unit, which is another $600 part. Other dealers have quoted only $1200 to fix the exact same thing, with others charging more than double that. The 5 separate warning messages scroll across our screen repeatedly and are very distracting as you're driving. With multiple electrical issues already in recall status by Honda, this is another one that they should be taking responsibility for and not dumping this defective electrical repair on their customers. Who's to say that we won't be in this exact same predicament 3 or 5 years from now if the part or parts aren't fixed! definitely expect more from Honda. . . Very disappointed and feel betrayed by the inferior parts they're passing on as quality products.

While driving, all at once several messages displayed, all of which are related to forward facing camera. Adaptive cruise control problem, collision mitigation system problem, road departure mitigation system problem, auto high beam disabled along with the brake system light turning on when I researched the internet, there are alot a people report this problem with the Honda forward facing camera witch supports the systems listed this failures. Talking to friends and neighbors they have had the same issues, it is about a $2000 fix to replace and recalibrate the camera link to user forum [xxx] most of the reported issues including mine are related to heat, the camera is in an enclosure located at the top center of the windshield. We just had heat indexes above 100 degrees. The camera is always hot to the touch. I also had this issue in the past put happened whole under warranty. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

All Honda sensing technology is not working and brake system indicator is on. Acc, lkas, collision mitigation, auto high beam, road departure. I read online that a lot of Honda Odyssey owners are experiencing same problem. It could be the front camera sensor. I have always had electrical problems with car. There crackling sounds when the radio or music is playing on the stereos.

The front camera is malfunctioning, affecting all of my safety sensors.

The multipurpose camera unit failed in my 2020 Honda Odyssey. This camera is responsible for enabling multiple advanced driver-assistance systems, including the collision mitigation braking system (cmbs), lane keeping assist system (lkas), road departure mitigation system (rdm), adaptive cruise control, and auto high beams. The component has not been replaced yet and is available for inspection upon request. The failure of the camera disabled multiple critical safety systems while the vehicle was in operation. These systems are designed to prevent lane departures, collisions, and unintentional road exits, especially at higher speeds. With the systems offline, I was at increased risk of collision or lane departure, particularly on highways or in low visibility conditions. This malfunction removed key layers of protection that the vehicle is designed to provide. The issue was confirmed by a Honda dealership on August 8th 2025, which diagnosed the problem as a failed multipurpose camera unit. They acknowledged that this malfunction disables all related safety systems. The vehicle was inspected by a certified Honda dealership technician, but not by police, insurance, or the manufacturer directly at this time. Multiple dashboard warning messages appeared simultaneously one day when starting the vehicle, including: "collision mitigation system problem" "road departure mitigation system problem" "lane keeping assist problem" "adaptive cruise control problem" "auto high-beam problem" these messages first appeared on or around the end of June 2025, and the systems were disabled immediately upon the failure.

My Honda Odyssey, after a hot summer day showed error codes related to the front camera. The adaptive cruise control problem (acc), auto high-beam (a); road departure mitigation system, collision/braking mitigation system; lane keeping assist problem (lkas) now are non-functional. Various internet users complain of the same issues without a conclusive source for the problem. It is either related to battery voltage or front-camera failure (possible due to heat/sun exposure). The 2020 vehicle was purchased used from dealer in 2024 where the battery was stated to have been replaced/new. Further, my vehicle has the infotainment package (tv/dvd) which has also previously drawn down the battery even after the car was shut off (I. E. , the electronics and/air conditioning are drawing too much battery and causing low voltages that impact the camera-based sensors). Multiple internet users complain of parasitic battery draw, fuses, poor oem batteries, and faulty behaviors with the camera system.

Our Odyssey has had mounting concerns w/electrical system. These are safety issues. 10/20. Work done related to electrical system-rear camera having issues. Left/rt rear door wires were replaced due to recall. Software update completed. Gage control module software updated-know issue. 10/rear windshield wiper not functioning-electrical issue & pump malfunctioned. Idol stop was not properly working. The car would stall out at stoplights as lifting foot off the brake & attempting to accelerate. Battery was replaced at this time & the vehicle was only 3 years old-we were charged. Issues with our car are electrical related & are seeing many others with similar issues. 8/24-11/key fob batteries died. After batteries were changed, issues with the power windows began immediately. Windows would not going/up or down all the way and were sticking. Soon after they stopped working all together. Auto locks wouldn’t work & the gas tank latch had to manually open to fill the gas tank. Finally took the car in for diagnosis. Said the motor in the door was broken & needed to be replaced. We were not convinced that this was the real issue b/c the problem began immediately after the fob battery issue. Instead of new parts, the dealer glued pieces together & gave us a discounted price. This was & is a real safety concern especially knowing windows were altogether not functioning & we don't believe that it was properly addressed. 2/after snow/icy weather front passenger side windshield wiper dispenser/sprayer wasn’t working. Upon checking, discovered it had become dislodged. Adjusted the piece & reattached this piece into place. As soon as car was turned on ,right after reinserting the piece into place warning lights came on-all brake/lane mitigation lights. After diagnosis, said it was an issue with camera at windshield & the camera needed to be replaced. Odyssey groups state electrical issue are know and many w/2020 Odysseys. 5/25 issues are beginning again with idol stop.

The problem first appeared in may 2025 when multiple system failure lights illuminated simultaneously. After confirming the battery and alternator were in good condition, I took the van to Honda of cleveland (2701 s lee hwy, cleveland, TN 37311) for a diagnosis. Their service department confirmed that the adas front camera (36160-thr-a91) had failed, which disabled the following safety systems: adaptive cruise control, automatic emergency braking, forward collision warning, lane departure warning, and lane keeping assistance. I asked if this is a wear component (expected to need replacement over time) and was informed that it is not. The quoted cost to replace the camera and calibrate was approximately $1,400.

Windshield monocular camera has became faulty. No longer have adaptive cruise control, lane departure, forward collision braking. Looks like about a $1,500 expense to fix. Seems like a very common problem.

Multiple warning lights: 1. Acc- adaptive cruise control 2. Lkas- lane keeping assist problem 3. Collision mitigation system problem 4. Road departure mitigation system problem 5. Auto high beam problem safety issues: with almost all of these not working the risk of avoiding a possible accident is greatly increased. An independent service center read errors for the can. No prior warnings, they just came up. I have replaced the battery and the issues were not resolved. An inspection is possible.

Front facing camera went out on a 2020 model. Several warning lights appear related to lane assist, front collision warnings, and automatic emergency braking. These safety features are important, and Honda should issue a recall. The camera is around $800 to replace, plus another $800-$1000 to install and calibrate. Car is only 5 years old, and there have been other camera/electrical related problems, and many recalls. Please hold Honda accountable to fix their declining reliability issues.

Out of nowhere I got a bunch of errors involving the addaptive cruise, lane keep assist, auto highbeams, collision avoidance, and the brake system light came on. The van has under 40k miles on it. From a quick search I can see that this is a very common issue.

Took it to certified Honda garage to solve another issue and now there is an issue with the front facing camera system. - adaptive cruise control - lane keeping assistant - collision mitigation system - road departure mitigation system - auto high beam system.

One morning randomly multiple warnings turned on on the dashboard of my 2020 Honda Odyssey . The following warnings turned on and have stayed on since: adaptive cruise control problem, lane keeping assist problem, collision mitigation system problem, road departure mitigation problem, auto high-beam problem, and brake system. This appears to be a common issue when searching online and appears to be a sensor issue.

Upon starting the vehicle, the following all fail: adaptive cruise control forward collision warning lane departure warning lane keeping assistance.

Front camera failure disabled adaptive cruise control, automatic emergency braking, lane departure warning, and lane keeping assistance.