Electrical System Problems of Honda Odyssey - part 1

Car leaks. Cargo bay fills with water. Possible mold issues. I am told this leaking causes damage to the control module for the tailgate. Our tailgate will close on us and has almost closed on our children. We have to be very careful when the children are around the tailgate because it will begin to close without warning.

See all problems of the 2020 Honda Odyssey 🔎.

This vehicle comes with idle stop. Many times especially at red light, the idle stop switches off the engine but then it does not restart automatically. We have to switch off the car and then restart it again. This takes some time. In the meantime, it is the panic with cars honking behind us.

See all problems of the 2025 Honda Odyssey 🔎.

Vehicle failed to restart after auto idle stop engaged while stopped in traffic. The engine shut off as expected but did not restart when releasing the brake pedal. A warning message appeared briefly on the dashboard but could not be fully read due to traffic conditions. The vehicle remained unresponsive until I shifted into park and manually restarted the engine. This has occurred intermittently. The vehicle was previously evaluated by a dealer for the same issue, and the battery was replaced at approximately 15,000 miles. The problem has continued to occur after battery replacement. This creates a safety concern due to inability to move the vehicle in active traffic.

At a stoplight vehicle turned off and gave a battery light and vehicle lost all power and placed vehicle in park. A warning message came up very quickly about something wrong with the auto start/stop system on display. Vehicle remained off until after opening door and pressing engine start stop button multiple times along with depressing and releasing brake pedal multiple times. This occurred the first time in late February 2026 then again on 3/21/26. Vehicle has 46,880 miles currently.

Multiple safety systems on my 2019 Honda Odyssey elite 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/ cameras, 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.

See all problems of the 2019 Honda Odyssey 🔎.

Tailgate door is not functioning. Tailgate problem message on dash. Cannot open door with remote nor manually.

See all problems of the 2018 Honda Odyssey 🔎.

Five days after getting back our car from the Honda dealership where they “fixed” the two recalls all warning lights came on and not turn off. Steering, breaking, accelerating all are difficult. There were no issues prior to the dealership “fixing” the recalls. The car was just at our mechanic for brakes and they check our engine, fluids etc every time. There were no prior issues.

Rear hatch power door issue indicated on dash display, and complete failure of powered door feature. Investigation finds many other drivers of this make/model/year have issues with faulty seals allowing water intrusion into circuitry in left rear panel where the power lift fat control unit box is, causing damage to the circuitry. Other drivers have described more widespread electrical issues, some even causing the gate to unlatch while the vehicle is in motion. Upon inspection of my personal vehicle, signs of water damage were found both in the base of the area covered by the panel and within the circuit box and panel itself, confirming these suspicions.

Back up camera display went black and issued error. This error is sporadic. Please approve replacement.

See all problems of the 2023 Honda Odyssey 🔎.

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.

2018 Honda Odyssey rear tailgate problems, what was the issue? problem is because water is leaking from the roof rails onto the tailgate module, causing the power liftgate control unit to short circuit, leading to unintended opening/closing or complete failure. I checked every fuse and my tail gate still wont open! tailgate module failed due to leak on the roof rail. The "holes" are three very small spots that the weld didn't cover. . . . . . .

After stop at traffic light with air conditioning on, the auto idle stop system engaged. When the brake was released, the engine stalled, able to be restarted after 5-10s. Problem exactly matches nhsta investigation ea25004.

The vehicle unexpectedly shifts into park while driving. Each time this occurs, I have to turn off the car, use the “push to start” feature to restart it, and then shift back into drive. This issue has happened multiple times, creating a safety concern while on the road.

The car will shut off at stop lights and randomly not start back up when the light turns green, then it will take a few minutes to start back up using the push button, this only occurs with the automatic start stop feature of the car my wife drives the car with our two young children and being stuck in intersections randomly is not safe for anyone ,. We have told the dealer about the issue and they have failed to duplicate the issue and said nothing is wrong,.

When stopped, my 2025 Honda Odyssey often fails to restart after the auto-idle stop engages. The engine stops, and fails to restart, and lights flash on the screen. I have to then turn the car all the way off, and on again, a process that can take upwards of 15 seconds. The issue happens daily. It will happen on the highway. Additionally, the button to disable the auto-idle engine stop is unreliable and sometimes doesnt work.

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.

I own a 2019 Honda Odyssey with approximately 100,000 miles. The power tailgate began malfunctioning suddenly. The rear hatch repeatedly unlatches and beeps as if it is opening even while the vehicle is in motion. After inspection, the dealership stated the tailgate control module failed due to water intrusion into the rear hatch area. I was told this is a known issue affecting multiple model years of Honda Odyssey vehicles (2018–2021), but there is currently no recall. This malfunction creates a potential safety hazard because the tailgate may unlatch unexpectedly while driving and causes continuous warning alarms and electrical issues. Owners are being required to pay for repairs caused by what appears to be a design defect allowing water to damage the tailgate module. I am requesting that this issue be investigated for a potential safety recall.

The idle stop on the van will stall the vehicle. This has happened 3 separate times where the vehicle stops, then stalls when the engine tries to turn back on. This can be very dangerous, especially when trying to turn from an intersection and the vehicle stalls.

See all problems of the 2024 Honda Odyssey 🔎.

The contact owns a 2025 Honda Odyssey. The contact stated that while stopped at a traffic light, the vehicle unexpectedly shut off. An unknown flashing warning light was illuminated, and the vehicle was manually restarted. This failure occurred frequently. The dealer was not notified of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 30,000.

This vehicle is a 1 year old (2025) Honda Odyssey with roughly 11,000 miles. On two separate occasions now, the auto start-stop feature has caused the engine to die altogether. On both occasions, the vehicle stopped at a red light in a busy intersection, the auto start-stop feature turned off the engine (intentionally), but when the light turned green and my foot came off the brake and onto the gas pedal, the vehicle died entirely. A number of lights and an error message illuminated on the dash board. From my online searches, it seems as though this is a very common issue. 1. What component or system failed or malfunctioned, and is it available for inspection upon request? auto start-stop / engine. No not available. 2. How was your safety or the safety of others put at risk? having your vehicle die at a busy intersection or stop sign is a huge risk. It can cause others to try and swerve around you, or it can cause someone not paying attention to rear end you. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? the vehicle will be brought to the dealer in the coming days. Unfortunately this is my only vehicle and I cannot afford to lose it for an extended amount of time, therefore I have to prolong inspection and servicing. The issue has happened to me twice, and has happened to countless others online. According to others on the internet, the dealers are typically slow to address this issue, and even when "addressed" the issues seem to continue. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? no, see #3. 5. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? no warnings prior to the engine cutting out altogether. Only a message after the failures. In both cases I do not remember what the messages said because I was scrambling to restart my car in a busy intersection.

I’m experiencing issues with the auto idle stop system. The engine fails to restart on its own after a complete stop. I get an error message and I have to manually restart. This has happed at stoplights and in the middle of an intersection during heavy traffic which is a big safety issue.

The power tailgate system on my Honda Odyssey failed. The dashboard displays a “power tailgate problem” warning message and the tailgate will not open automatically using the key fob, interior button, or rear handle. When attempting to open it electronically, the vehicle beeps but the tailgate does not move. The tailgate can only be opened manually. The vehicle and tailgate system are available for inspection upon request. The failure creates a safety risk because the tailgate cannot be opened electronically in situations where quick access to the rear cargo area may be needed. Additionally, if the power tailgate system fails unexpectedly, it could malfunction while opening or closing, potentially striking someone or failing during loading/unloading. The inability to rely on the automatic tailgate also creates hazards when carrying items or supervising children around the rear of the vehicle. The problem occurs consistently every time the power tailgate button is pressed. The system beeps but does not open. The issue has not yet been formally inspected by a dealer but can be easily reproduced. The vehicle has not yet been inspected by the manufacturer, police, or insurance representatives for this issue. A “power tailgate problem” warning message appeared on the dashboard when attempting to use the power tailgate. At the same time, the vehicle emits a beep but the tailgate does not move. The issue began recently and has occurred every time the power tailgate has been used since the warning first.

All the warning lights shows up in the dash and the problems are diferent like bad battery or front monocular camera and all the futures assistence stop working like automatic brake cruise control. . Etc.

What happened? while driving my 2025 Honda Odyssey, the engine failed to restart during an auto idle stop event at a 4-way stop/intersection. When releasing the brake to take my right-of-way, the engine stalled completely. The vehicle became immobilized, the power steering went heavy/stiff, and the brake pedal became difficult to depress. I had to manually cycle the ignition by shifting to "park" and pressing the "start" button multiple times to regain power while traffic was waiting. This has occurred twice. What component or system failed or malfunctioned? the auto idle stop (ais) system and the starter/charging system. A service technician recently documented a "slow crank" during routine maintenance, suggesting the battery is unable to handle the restart load. How was your safety or the safety of others put at risk? the vehicle stalled during a right-of-way transition (green light/4-way stop). This created an immediate risk. The loss of power steering and the stiffened brake pedal could have made the vehicle nearly impossible to maneuver manually on an incline during the failure. Has the problem been reproduced or confirmed? a dealership technician confirmed a "slow crank" symptom during a multi-point inspection, though they could not reproduce an issue. The battery tested good. Were there any warning lamps or symptoms before failure? yes. A "slow crank" was noted by a technician when attempting to start my vehicle to check my vehicle mileage. During the stall itself, a red exclamation point warning appeared on the dashboard.

My car’s power system is totally off twice suddenly ( around 4:00pm & 8:30pm) when I completely stop at the traffic light. Cannot re-start the car, cannot open the rear doors, cannot turn on the emergency light to warn other cars. After waiting for a a few minutes, the power is back, I can start my car again when my car totally loss power at 8:30pm and cannot turn on the emergency light at night, and cannot open the rear doors for kids getting out the car. It is very dangerous to the passengers.

See all problems of the 2022 Honda Odyssey 🔎.

The vehicle was stopped at a red light. This vehicle is equipped with an auto-start/stop system to save fuel. Once the red light turned green the engine refused to restart. This was the second instance. The vehicle took over 30 seconds before it would restart. None of the push-to-start buttons worked, the car would not recognize that the brake was pressed, and it had also shifted itself into park. Very dangerous while traffic was moving all around us.

I bought this van brand new for over $53000 and it has been hesitating to start for months. I had the battery tested and came back good. The van hesitates to start and sometimes I have to redo the push button because it fails to start the first time. Yesterday, 02/23/2026 the van left myself and the kids stranded at walmart. It would not start for anything yet the lights and radio work and acted like it was not the battery. I had to call my husband to come get us. We went back hours later to jump it and it started. Something is faulty with the started or electrical system to start it. I have another appointment to test the battery and I know its going to test good because I just had this done a month ago and it still hesitates to start. I am not impressed at all and readying online that I am not the only one having this problem. It needs looked into.

I stopped at a red light and then my car just stopped. It seemed the car wasn’t able to start up the engine from the idle mode. I had to restart the car at the intersection with a truck behind me and with 3 kids under the age of [xxx] on the car with me. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

After a drive, shut it off, walk back to car within 2 minutes, car wont start. It cranked but failed. Never happen in cold start, but always after a drive. Happen about 8times in 9,000 miles and is more and more frequent now.

The driver-side power sliding door latch, motor and cable system on my 2019 Honda Odyssey elite failed. Honda performed recall a88 (sliding door handle cable repair) in 2021. After this repair the door began intermittently failing to close fully and would close about 80% before the sensor triggered it to reopen. This continued until this week when the door suddenly stopped latching completely. The automatic door buttons no longer work and the door can only be moved manually. I believe my vehicle should also be included in recalls z33 and o36 addressing sliding door latch failures affecting similar 2019 Odyssey vehicles. The failed components are available for inspection upon request. This defect creates a serious passenger safety hazard. Because the door will not latch, it opens while driving. The automatic function does not work and the door can be moved manually but will not latch. This creates risk of passenger ejection, especially children, and the possibility of the door opening during a crash. The vehicle is unsafe to operate. Yes. The failure was reproduced and confirmed by a Honda dealership that inspected and diagnosed the sliding door failure. The vehicle was inspected by a Honda dealership and I was charged a diagnostic fee. Honda refused recall or goodwill coverage because my VIN is not included. I request the repair be performed free under recalls z33 and o36 and the diagnostic fee reimbursed. I am waiting for NHTSA inspection and request Honda be required to include my vehicle and repair it at no cost. Before total failure the door would close about 80% and automatically reopen. When it stopped working this week, the dashboard displayed a “left sliding door problem” warning and the vehicle produced continuous beeping while driving.

The vehicle previously received a manufacturer dash wiring recall repair. After the recall repair was completed, the vehicle began experiencing intermittent and cascading electrical and communication failures across multiple integrated systems. Affected systems include apple carplay, the dvd system, in-vehicle camera systems, cabinwatch, and repeated “most network unavailable” error messages. These failures occur intermittently and result in multiple systems disabling simultaneously. The vehicle was inspected by a Honda dealership, which confirmed the issue involves wiring within the dash harness. The dealership stated the affected wiring is not sold or serviceable separately and that correction would require replacement of the entire dash harness, but that this portion of the harness is not included in the original recall coverage. Because these systems share common power and communication pathways, failures cascade across multiple modules. When the camera system fails, rear view camera functionality and related warnings are unavailable while backing up, reducing the driver’s ability to detect obstacles, pedestrians, or children behind the vehicle. When cabinwatch is unavailable, the driver is unable to visually monitor children seated in the rear rows while driving, which affects situational awareness and the ability to respond quickly to unsafe conditions inside the vehicle. These failures also impact driver information systems and create intermittent loss of critical visual feedback, increasing driver distraction as systems drop out unexpectedly while the vehicle is in operation. The condition began after the recall repair and appears to be related to or a continuation of the original recall defect. The vehicle remains available for inspection, and the condition has been confirmed by a manufacturer-authorized dealer.

Tailgate control module damaged by water leaking from faulty rear body seam seals on left top of vehicle doors would lock and unlock on their own while driving and tailgate signaled it was open but never unlatched manual tailgate opening/closing did not work at all constantly beeped when unlocked and alarm went off randomly all electrical activity drained battery and made vehicle undriveable; tow was necessary first sign was "power tailgate problem" light on dash 5 days before vehicle battery was dead Honda charged for and replaced tailgate control module and recommended an outside company to repair leak issues; outside company confirmed issue and noted repairs for same issue on similar models.

Multiple possibly related issues: 1) power lift gate (rear hatch) will on occasion close unexpectedly and can trap a person between the hatch and the back bumper of the car. Very dangerous for children and for handicap adults who cannot move quickly (I have had both have issues with mine). (has consistently occurred since purchase, dealership refuses to acknowledge/correct issue when it was under warranty). 2) random electrical problems (various sensors malfunctioning, sliding doors unable to open/close, power lift gate would not close/latch). Occurred twice (Jun 2023, Feb 2026).

Auto idle stop has malfunctioned several times causing me to get stuck at an intersection with warning lights flashing causing me to manually shift to “park” or shut down entirely to get it to restart. I was in the vehicle with my three kids and the light turned green and I could not move in heavy traffic. We took the vehicle into the Honda for service and they replaced my battery and did a full system check and battery reload test. Since replacing the battery, it has happened three times in 2 months. The remote start will not start when I try to get vehicle to start when outside the vehicle.

Receiving acc, lane keep assist, front collision , auto high beam errors on the instrument screen. None of the safety features work. Cruise control does not work.