Electrical System Problems of Honda Odyssey - part 1

Power tailgate problem is going off repeatedly while car is on. Power tailgate does not open with remote or button inside car. There seems to be water leaking in tailgate seams. The constant beeping of problem popping up is startling and distracting to driver.

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With vehicle auto start/stop feature enabled, vehicle just shuts off when attempting to start back up after shutting off at a stop light. It has happened multiple times and recently it even happened with the auto start/stop feature turned off. Took it to the dealership and they tested everything to include the battery and they weren’t able to duplicate it. A review of forums showed other people with the same issue and it is pointing to a faulty starter, but no recall has been issued yet.

While operating the vehicle, I have experienced repeated problems with the idle stop/start system. Specifically: 1-the engine automatically shuts off at stop signs and stop lights as designed, but at times the vehicle fails to restart immediately when the brake is released or the acceleration is pressed. 2-multiple occasion while stopped in traffic the vehicle unexpectantly shifted into "park. " 3-for the last 3 weeks the vehicle sometimes hesitates to start on first attempt.

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The idle stop feature failed to restart the engine when I released the brake after having stopped at a traffic light. Eventually restarted after more than a minute of manually pressing the ignition button.

On October 31, 2025, I brought my vehicle to the dealer for several issues, including an auto engine idle stop system problem, a memory seat malfunction, and other concerns that were discussed with the service advisor and are listed in the invoice. I was charged almost $1,000, including a new battery. Initially, some of the problems appeared to be resolved, but shortly after the service, the auto engine idle stop system problem reappeared, and the memory seat stopped working again. Even more concerning, a new and dangerous issue began immediately after the repair: while driving at night, the headlights suddenly turn off for a few seconds and then turn back on, and the “auto engine idle stop system problem” warning appears at the same time. This issue never occurred before the dealer performed the repair. This situation is extremely unsafe, especially when driving in dark conditions with my family. I contacted the dealership through their “contact us” form on November 2, 2025, and again via live chat on November 5, 2025. I was told that someone would reach out to me, but as of November 9, 2025, I have received no response.

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The idle stop system is malfunctioning. I had it inspected once previously and now trying to get it inspected again for the same occurring issue. The dealership continues to tell me to turn off the idle stop feature on the vehicle. My safety was put at risk because of the vehicle stalling and not kicking back on while being stopped at a redlight on a busy 4 lane highway multiple times now. The first time, I was by myself. The second time, my 8-month-old was in the vehicle with me. This causes a lot of panic as there are impatient drivers around me since I am unable to move my vehicle. I fear that this could happen on a freeway if there was construction, an accident or even while trying to turn in an intersection and getting hit because I can’t move my vehicle and often have my two small children with me. The first time the idle stop stalled, it occurred twice in a week. The first time was rather quick, and the engine kicked over quickly so I did not think anything more of it. The second time which happened a few days later (9/17/25), took about 5 minutes to get the engine going again and moving on the road (4 lane highway). I took it back to my local Honda dealership where they performed a diagnostic test and discovered the battery had dipped down to 7. 22v when trying to restart, the battery failed the battery test and ended up being replaced with a new battery. The idle stop issue has now happened for a third time (10/21/25), with the same issues occurring and I am waiting to be able to get back into Honda. The vehicle has only been looked at by my local Honda dealership. There were no warning lamps, messages, or other notifications prior to the failure. I received a warning on the dashboard after the events occurred on how to start the vehicle. This is very disappointing as a new Honda owner. My husband and I decided on Honda over other car companies due to their reliability and this has now become a constant worry.

I am the original owner of this vehicle and have performed all regular maintenance on schedule. It is our primary family vehicle and now over 120,000 miles. Since purchasing it new in 2018, the fuse for the horn has blown out several times each year. Most recently, the horn has stopped working, but the fuse remains intact. I am at a loss as to how to repair without taking apart the steering wheel which could damage the airbag. This is a serious safety issue as the horn is necessary to avoid accidents. I have spoken to the service department at my dealer and they are unaware of any recalls affecting the horn.

I am having issues with my auto start/stop, also, occasionally has issues starting from a cold start! I was at a red traffic light, and once the light turned green I went to go and my car died. I had to put it in park and try and restart it and it took me three times for it to restart. Everybody was honking at me. This is a safety issue.

Since July 4, 2025, this can has intermittently shut off and stalled on me, my wife and my family and has refused to start. It has now been back to the service department of trust Honda of palmdale 4 different times for the same problem and the battery has been replaced on this van back in July. Most recently, it stalled just two days ago in rush hour morning traffic on the 405 freeway going south in the san fernando valley. The display on the dash read “dead battery “. It took over 20 minutes for the van to start and my wife was able to move it off of the freeway to a safe location.

The contact owns a 2019 Honda Odyssey. The contact stated that while driving at an undisclosed speed, the vehicle suddenly shifted into neutral as indicated by the gear shift indicator light. The contact was able to coast to the shoulder of the roadway, where the failure persisted, and the vehicle was unable to shift into drive. The adaptive cruise control, lane keep assist, collision mitigation system, road departure system, and transmission fault detected messages were displayed. The vehicle was towed to an independent mechanic, who diagnosed a failure with the transmission control unit. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA campaign number: 19v299000 (power train, electrical system), but the VIN was not included. The manufacturer was not notified of the failure. The failure mileage was 133,000.

The media touch screen display periodically goes blank and reboots during driving, which affects the backup camera, defrost control, and every other component controlled on the touchscreen display.

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Failed monocular camera : it is a very common issue across majority of Honda Odyssey. It's the overheating of the camera and start to malfunction, causing all the warning systems lights to illuminate. A lots of people and families who have owned or currently owns Honda Odysseys minivans have either faced this problem in the past or having it more commonly now. Due to the malfunction caused by the failed monocular camera, it tends to automatically disables the lane assist function, engine light comes on, cruise control get disabled and two other warning comes on the dash. Please note that there are a lots of families who own these Honda Odyssey have been facing this manufacturing fault that Honda needs to address.

Honda Odyssey idle stop system failure vehicle: 2020 Honda Odyssey (elite) incident description: while driving, the vehicle's "idle stop" system engaged as I came to a complete stop at [e. G. , a traffic light, intersection, stop sign]. The engine shut off as designed, but failed to restart automatically when I released the brake pedal. This left my vehicle stalled and disabled in the middle of [e. G. , an intersection, a lane of traffic] with no forward power. I was scared as there were lots of cars behind me in the intersection. This has happened over a dozen times. Safety risk: this failure created an immediate and dangerous safety hazard. My vehicle was a risk for being rear-ended by traffic from behind, and my family was stranded in a vulnerable position. The vehicle was unable to move out of harm's way, and I had to put the vehicle in park and manually restart the engine. This is unacceptable for a system designed to work seamlessly and automatically. Additional information: this is not an isolated incident. The auto start-stop failure has occurred multiple times since March 2025. The system failure has put me and my passengers in a position of significant risk multiple times. Failed component: the vehicle's "auto idle stop" (ais) system, which failed to restart the engine after it was automatically shut off. Resolution: an immediate and permanent recall is necessary to address this dangerous defect. Existing service bulletins have not corrected the problem. I urge the NHTSA to require Honda to provide an effective, long-term solution to ensure the safety of Odyssey owners.

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Failed windshield monocular cameras, collision mitigation lka adaptive cruise lane departure mitigation auto high beam.

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The auto stop/start or auto idles feature on the car keeps stalling after the car stops at the red light. It can cause a rear collision.

The issue involves the auto start/stop system on my 2025 Honda Odyssey touring. When the feature is turned on, the vehicle intermittently fails to restart after coming to a complete stop. The problem does not occur when the start/stop system is disabled. During normal driving, the engine shuts off as expected at a stoplight, but when I release the brake, the vehicle hesitates or fails to crank, leaving it stalled in traffic. The Honda dealership confirmed the issue and stated that the starter motor needs to be replaced. The van has approximately 9,300 miles. No warning lights or messages appear before the failure. The problem occurs only when the start/stop system is active. This presents a safety concern, as the vehicle can lose power and fail to move when traffic lights change or when merging, increasing the risk of a rear-end collision or blocking intersections. The vehicle is currently being inspected and repaired by the Honda dealer and is available for inspection upon request.

Something is wrong with the camera and causing all warnings to go off.

Mass safety system failure due to front projector camera/ wiring harness. Noted systems below failed: adaptive cruise control auto emergency braking forward collision warning lane departure warning lane keeping assistance auto high beams all above system are not operational.

On multiple occasions, the idle-stop function engaged at a red light and then either the entire car shut down or the computer froze for a minute or two then restarted. For each incident, we had cars behind us that either nearly hit us when we did not go forward when the light turned green or nearly hit us by aggressively going around us while we restarted the engine.

Read driver side power sliding door, got stuck halfway open. I've had this happen on the passenger side as well, but after turning the car off, putting power doors to manual, and rocking it back and forth, I got it fixed no problem and ended up having to replace a bump sensor on the door and it resolved. I thought that's what was going on when it happened to my driver side door as well. However after I turned the car off, and turned the doors to manual it still wouldn't close. I turned them back to automatic, turned the car back on, and the door proceeded to start going back, it rocked violently then broke the rear window and before stopping again. I read this track roller has been a problem for many users of this van and in some cases the entire door has fallen off because of it.

Vehicle stalled on a highway after an idle stop event at a stop light. Vehicle went to park. Required a full restart by operator to go when light changed and traffic was flowing in other lanes. Dealership examined next day and indicated battery was good. Voltage dropping to 8v to 10v when starting. Recommended to disable idle stop each time vehicle is started. A new starter was authorized and placed on order.

Vehicle lost power resulting in the vehicle automatically going into park and powering off while driving. This has happened multiple times. In addition, we will get strange electronic codes. Tested battery and systems successfully, but problem persists.

See all problems of the 2021 Honda Odyssey 🔎.

The camera started malfunctioning and now I have a bunch of warning lights on the dash. I think is crazy that a lot of people have the same issue and still there is no recalls for it. Is a major safety issue.

Vehicle shut off and put itself in park leaving a stop light. Was hard to restart.

The forward facing camera has failed. A myriad of systems are dependent upon functionality of camera including collision mitigation braking, lane keep assist, lane departure warning, forward collision warning, cruise control, and automatic lighting and high beams. The failure also prompts a transmission system failure, though it's unclear how/why that system would be related. All issues are prompted by warning lights on the dash and the systems are inoperable. Research of the issue suggests it's a common failure across Odyssey and cr-v models with front-facing cameras and related safety systems.

What component or system failed or malfunctioned, and is it available for inspection upon request? passenger side sliding door not functioning while vehicle turn on. How was your safety or the safety of others put at risk? passenger on my vehicle can't exit out the vehicle in case of emergency. Has the problem been reproduced or confirmed by a dealer or independent service center? none. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? none. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? none.

Like many other people on the [xxx] forums, our Honda Odyssey has a water leak that dripped onto the tailgate control module, causing it to corrode and stop working. Now, our tailgate door will not open or close electrically, nor even manually using the handle outside. We have to crawl through the vehicle into the trunk, open a trim piece with a screwdriver, and stick our finger into the mechanical parts to disengage the latch to allow the door to open. Safety issues: 1) it's hard to know whether the door is fully closed and latched, so it could pop open while driving. 2) in the event of a car crash or other emergency, we may need to rely on that tailgate door being operational, so it being jammed by a widespread and known problem seems like a predictable life threatening issue. Links to some of the forum threads where other people report the exact same issue: [xxx] [xxx] [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

My can intermittently fails to start after the auto idle start system has engaged. I am stopped at a light on a busy road. When the light turns the car tries to start but fails. Some times it is able to start but I get warnings that multiple systems had an issue or at disabled. Other times it fails to start completely and I have to cycle the power off and open my driver door before I can start the car. This has been happening for more than a year and the battery has already been replaced.

My engine lights started flashing. I was stranded with my children. Had to coast into a nearby gas station. I’m told it’s a failed monocular camera causing all of it. When I google that it looks like it has happened to so many people! a recall needs to happen.

The vehicle engine failed to restart after being idle for a few minutes in heavy traffic on southern state parkway. The vehicle’s auto idle stop function was being utilized during this time.

On 9/11/25 and 9/12/25. Vehicle would not start. Engine would not turnover and no power to display or lights. After 15 minutes, each occurrence car would start with my diehard jump starter. Battery replaced 3 weeks prior and also checked on 9/11/25 . Battery should 600 cold crank amps and alternator was good. Then on 9/13/25, I was at a red light and proceeded when light turn green and shut off. Was same results afterwards wait 15 minutes and jump started.

I hear a popping/crackling noise from the speakers then I get complete network loss for my backup camera, my dvd player, my clock, maps etc. System does a report after 5+ minutes. Message displayed before everything goes black is network connection lost and most net off. This issue is ongoing and seems to happen now every day sometimes multiple times in a driving session. It just started about 2 weeks ago. There is an active recall for this exact issue for 2021 Honda Odysseys but my VIN does not seem to be included.

While traveling in my 2019 Honda Odyssey (40,000 mile) the vehicle completely shut off and placed itself into neutral. The warning lights for emissions system problem, brake problem, and parking assist problem lit up on the dashboard. The vehicle went into neutral and would not allow me to drive at all. Then the vehicle shut off all within 30 seconds. The vehicle would then not restart and now I have to get the vehicle towed to the Honda service department. After looking through other complaints there is a known recall for manufacturer defected fuel injectors for my year model Odyssey but does not appear when I search for recalls. This was an insanely dangerous situation here in oahu where the traffic is very bad. The vehicle gave no warning or check engine light and we have completed every service for the vehicle. The vehicle just randomly completely shut off and would not restart leaving my family of 5 stranded.

On [xxx], while driving in traffic, my 2018 Honda Odyssey suddenly and without warning shifted itself into park. The vehicle slammed to a stop in the middle of an intersection, stranding my family and creating a serious risk of collision and injury. The vehicle would not move afterward and had to be towed from the scene. After the failure, the dashboard displayed multiple warnings: “transmission problem,” “stop driving when safe,” “emission system problem,” and *“blind spot information system problem. ” the gear shift indicator also blinked. The Odyssey has remained undrivable since the incident. The vehicle is at stockton 12 Honda in sandy, utah, where the dealer confirmed a hard transmission failure (ro #[xxx]). Honda corporate opened two cases (#[xxx] and #[xxx]). Despite my repeated calls and emails, Honda’s assigned case manager verbally denied coverage on sept 12, 2025, stating the denial would only be reflected in Honda’s internal case notes. This failure is identical to the defect described in NHTSA recall 19v-299, in which the transmission control unit (tcu) can reboot due to low voltage and cause the transmission to shift into park while driving. Although my VIN is not currently flagged, my Odyssey ex-l uses the same zf 9-speed transmission and tcu as affected trims. I have a tow record, witnesses, and video evidence documenting the event. The vehicle remains disabled, leaving my family without safe transportation. This is a serious safety defect that should require investigation and expansion of the existing recall. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The multipurpose camera in mounted underneath the rearview mirror stopped working. No apparent reason for the malfunction to shut the vehicle off while filling gas and then five different warning lights occurred, including issues with lane keep assist, adaptive, cruise control, automatic, breaking, and several other safety features no explanation for the failure when that vehicle was taken to the dealer and currently being charged $2500 for a replacement of the camera and labor associated with the repair. My belief is that the system is malfunctioning due to overheating, which is a design issue associated with the vehicle and isn’t something that I should be responsible for.