Electrical System Problems of Honda Odyssey - part 1

We were waiting at a busy stoplight and our vehicle shut itself off and put itself into park. We could not get it to start again so we were stuck in the middle of traffic.

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Car has stalled multiple times at red light and intercection and failed to restart upon releasing the brake. Unable to restart car without waiting and trying to manually stop engine and turn car off and back on. This has happened multiple times almost causing an accident. Car has been taken to Honda for diagnostic of a known issue.

While driving and coming to a red light applying brake coming to a stop the vehicle completely shut off. All lights turned off no power was going to the vehicle leaving us in the middle of the road while light turned green and then back to red twice we were just stopped with no electrical activity on the vehicle. This happened three different occasions another occasion was during traffic stop and go at a stopped point it shut off again.

Honda claims they fixed the recall for the most communication systems and the fakra cables. I have the vehicle and the connectors have not been changed. I called Honda and they reefusing to fix the issue after I have priveded them with picture evidence and their repair manual.

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The vehicle continues to shut off its engine at stops and is unable to restart. This has been occurring at an increased rate since I initially reported it last summer. Warnings come on the dash as it struggles to try to restart. Recently it has started to take a full light cycle to get it to restart. I have to turn the vehicle off and wait some time and try restarting it. I’ve notified the dealership antrim Honda and their service advisor said it’s a known issue but the starters are on national back order and there’s nothing they can do to help.

Dear NHTSA, my 2025 Honda Odyssey failed to restart after the auto idle stop system shut off the engine at a traffic light. I had to move to the side of the road and call a tow truck. This created a dangerous situation, and I am concerned about the safety of this vehicle. I respectfully request that NHTSA investigate this issue to determine whether other Honda Odyssey owners are experiencing the same problem.

When auto shut off enables at stop lights, sometimes the car goes into park and seems to turn lff and has an error message. It requires pushing the brake and manually starting the car by hitting the on button. There is risk to a rear end collision since it doesn’t happen until you take your foot off the break to start after stopping so creates risk of a rear collision if cars behind don’t noticed you are stopped. It has happened multiple times and seems to happen even more frequently in eco mode.

The idle/stop function fails frequently at stop lights and stop signs. When it stops the engine it fails to restart and drains the battery. It began occurring very early on with the vehicle I’m guessing around 20,000 miles. I took it to the dealership while it was under warranty and they replaced the battery, and I believe the starter. It seemed to help for awhile but around 40,000 miles it started occurring again. I’ve been lucky to not be rear ended but drivers have had to go around me or sit through a stop light. There are no warning lights. I try to turn off the idle off button every time I start the vehicle. It is very unsafe and no longer under warranty. The dealership seemed like they didn’t know what was causing it last time and they had the van for over a week.

While driving today at about 30 mph, the minivan suddenly braked on its own—despite there being no obstruction ahead—and began beeping. The word "brake" appeared in large letters in the center of the panel, flashing, before suddenly releasing. My wife and I both suffered whiplash from the incident. There was nothing in front of the van; the only thing nearby was some cars parked on the curb along the side. My wife told me this has happened a couple of times before, and she reported it to Honda of tomball. I'm very concerned that if we're driving at highway speeds and there are vehicles on both sides of our lane, this issue could occur again, and we could have a serious safety problem on our hands. In addition to this, we've been experiencing another issue: the van suddenly shifts into park when we come to a stoplight. This has happened three times. Yesterday they replaced the battery, but they still suspect it could be a starter issue.

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Engine fails to restart after auto idle stop - stalled in traffic twice on consecutive days. On xxx around noon, at [xxx], I was first in line in the left-turn lane at a red light, with my [xxx] daughter and another adult passenger aboard. The auto idle stop system shut the engine off. When the green left-turn arrow came on, the engine did not restart and a stall warning appeared on the dash. I had to confirm the van was in park with the brake applied, turn the vehicle completely off with the start/stop button, and press the start button many times before the engine started. The van sat stalled at the front of the turn lane, blocking traffic, for roughly 60 seconds during the green arrow. The night before, xxx around 11 pm, the same failure happened in the left-turn lane on [xxx]: the engine shut off at the red light under auto idle stop, did not restart when the green arrow came on, and I was stalled in traffic for roughly 60 seconds going through the same restart process. Since about late xxx the engine has also at times restarted roughly after auto idle stop, even when it does not stall. I could not read the exact warning message because I was stalled in live traffic. A dealer has not yet inspected the problem; the vehicle is being taken to a Honda dealer for warranty diagnosis and is available for inspection. I am aware of NHTSA investigation ea25004 into restart failures after auto idle stop on Honda vehicles, including 2018-2025 Odysseys. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The engine fails to restart automatically after shutting off at a complete stop (such as a red light or intersection.

The auto idle feature has caused my car to stall multiple times. This is extremely dangerous because it always happens when I am in populated areas- sometimes at red lights and another time in stop/go highway traffic. My car is 1. 5 years old and this keeps happening more and more frequently. I am very concerned that one of these times I am going to be rear ended because traffic starts to go, I let off the brake to drive and then my car stalls. I then have to turn my vehicle off completely and then back on to get it to not have issues. I do get a warning saying to depress the break and press the start button. Sometimes I get a red battery light on the dash.

The auto-stop/start feature in this vehicle, when activated, causes the engine to stall when starting back up. We have had the battery and starter both replaced, and it is still causing an issue. Now, even with the system deactivated, the vehicle will stall, most likely based on the increased wear on the starter. We have noticed that during initial startup, we have to press the ignition button several times before the vehicle actually starts, and often, when it does start, it struggles to start right away.

The vehicle was slowing due to stopped traffic and the engine suddenly shut off (before the vehicle had come to a complete stop) and put itself into park. The vehicle could not be immediately restarted. The car was blocking traffic. After leaving the car off for approximately 10 minutes the car was able to restart.

The auto idle stop (ais) on our 2025 Honda Odyssey will cause the van to stall and the engine will not restart. When this happens, our only option is to put the van in park, shut it down and then restart. Sometimes that van has not restarted for almost 90 seconds. We have had it into the Honda dealership three separate times for this issue. The first time they told us the battery was drained so they recharged for over eight hours. The last time they said "the battery fails the load test at this time" so they replaced the battery and stated that the vehicle was "operating as designed at this time. " since the last time we had it in for service (and with a brand new battery), the ais has failed on us twice. The last time (xxx) it nearly caused an accident on a busy road in northern virginia. When it fails to restart the van goes into a default type mode (where most of the service lights turn on or flash and we will have to put the hazard lights on, put the van in park, shut it off and then restart the van. This issue has happened to us about 12 times int he last 8 months. I am very concerned that this will cause an accident at some point and is putting my family's safety at risk. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Auto idle start stop system failed to start vehicle while. We were stopped at a red light auto idle shut down the engine once the light turn green and we attempted to move forward the auto start failed to cycle resulting in a stalled vehicle on the road, potentially increasing risk to passengers and other drivers on the road. This has happened multiple times.

My 2026 Honda Odyssey has only been driven for 7 months so far but several times has left me stalled in the middle of the road due to the auto idle stop (start-stop) system failing to restart the engine. When it happened today, I was stopped at a light, but when it turned green, the engine didn't restart, leaving me stuck in the middle of the road with cars going around me. This created a serious threat of a rear-end collision, which could result in serious injury or death. Three children were in the vehicle at the time, which is especially common for most people who drive this vehicle. When it occured, the dashboard displayed the message "to continue to drive, depress the brake pedal and push switch," but this did not work. The vehicle had to be completely turned off first then restarted normally. There was no prior warning or indications this would occur. The problem only occurs sporadically making it hard to reproduce by a dealer.

The auto idle stop (ais) does not work properly and is unsafe. When auto idle engages at a stop light, it is slow to restart, beeps and flashes the battery symbol, and sometimes fails to restart. On a more recent trip, when sitting on a freeway offramp waiting for the light to change with my entire family in the car, the vehicle completely failed to restart after ais engaged. We were sitting ducks on the freeway and were having difficulties restarting the van. We had to go into park, drive, and press the start engine button several times for anything to happen. This issue has been going on for a few months. The battery has been checked and is in good working order, no issues reported. The last battery check occurred today 11/5/2026. I am going to input the date the vehicle completely failed to start, since that time, I have tried to remember to turn off the ais feature when driving the vehicle. This is a new car and should not be experiencing this incredibly dangerous situation. 2025, Honda Odyssey elite.

When the car is stopped at a light. The car will shut off and shift into park and kill and I cannot restart the car until several times of trying.

My 2025 Honda Odyssey has repeatedly failed to restart after the auto-idle stop feature automatically shut off the engine while idling in traffic. This is a serious safety hazard that could leave the vehicle disabled in a busy intersection, exposing occupants and nearby motorists to the risk of a potentially catastrophic collision. Despite two starter replacements in October 2025 and October 2026, the problem has occurred multiple times. The authorized Honda dealership acknowledged this is a known issue but stated that no permanent solution is available. No warning messages were observed before the failures. A vehicle that can unexpectedly become inoperable in traffic presents an unacceptable safety risk and warrants urgent investigation and corrective action. Please associate the above statement with ea25-004.

The van turns completely off very often when at a complete stop. I am not referring to the auto start/stop feature which is equipped standard on the vehicle. The van physically turns completely off, as if I turned off the car, requiring me to turn the car on completely. This has created very dangerous situations as im often traveling trying to merge into traffic etc and the vehicle is off on active roadways. There is no warning, just turns off completely.

Our 2026 Honda Odyssey ex-l repeatedly shuts off completely while stopped at a traffic light or intersection and does not restart on its own. This is not normal auto idle stop operation. When the brake is released, the engine fails to restart; the vehicle must be manually restarted by pushing the engine start/stop button. This happened four times in the week of October 19, 2026 alone, in addition to earlier occurrences. Each time the vehicle is left stranded in live traffic in an active intersection, blocking traffic and creating a risk of a rear-end collision. No crash, fire, or injury to date. Approximate mileage 8,000. This appears to be the same auto idle stop failure-to-restart condition under NHTSA engineering analysis ea25-004, but that investigation covers only 2018-2025 Odyssey -- this vehicle is a 2026, outside its scope. The vehicle is under factory warranty. We request that the investigation be expanded to include the 2026 model year.

Start stop engine when on drive, car wont tyrn on got stuck on a interstate very damgerous I consider this a lemon.

The auto start-stop system fails frequently. If I do not turn off the system, when I stop on red light, the engine turns off as expected. However, it frequently fails to start. The car stalls and it's difficult to turn back on. I need to turn the car off completely first, then try to turn it back on. This usually takes 10-20 seconds. The situation presents a safely hazard as I'm not able to continue to drive through an intersection on a green light. I took the car to dealer 3 times. They were not able to reproduce he issue nor find the cause of the problem.

Multiple times since new the van has failed to restart when the auto start/stop has activated. This leaves me in an intersection with a non running car that I need to figure out the right combination of buttons to get it started again. Today it escalated and refused to restart until I shut off the ignition, open the door, closed the door, and then started it. Honda will not do anything if they can not duplicate it. So I am left with a car that is getting more unsafe to drive.

On xxx my 2026 Honda Odyssey touring, bought new on xxx and driven about 6,000 miles, was stopped at a red light in [xxx], with auto idle stop engaged as designed. When the light turned green and I released the brake, the engine did not restart. The transmission shifted itself into park, and the display showed a message to hold the brake and press d to restart. I followed it, but the vehicle would not shift into drive. The only way to get moving was to turn the vehicle completely off and restart it with the start button, stopped in a live traffic lane while cars behind me honked. The vehicle was disabled without warning in a travel lane at an intersection, exposing its occupants to a rear-end collision. Had the same failure happened while I was turning or crossing an intersection, the vehicle would have been stranded in cross traffic. For about two before this, restarts from auto idle stop had become slow and labored, with a noticeable delay before the engine caught. No warning lights appeared before the failure. The failure appears to involve the auto idle stop restart system. The vehicle has not yet been inspected. It is scheduled for warranty diagnosis at a Honda dealer on xxx, and is available for inspection on request. I understand NHTSA’s engineering analysis ea25-004 covers this failure on 2018–2025 Odysseys; this 2026 model shows the same failure. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

My 2023 Honda Odyssey (approximately 38,000 miles) has an intermittent no-crank/no-start condition. Pressing the push-button start produces no crank at all; the engine only starts on exactly the fourth press, consistently. The battery was tested and is good. The condition worsened noticeably after a high-pressure car wash, suggesting moisture intrusion. This matches Honda technical service bulletin 23-023 ("engine does not crank"), which covers 2018–2023 Odysseys and attributes the defect to water entering the starter motor. The vehicle is about 2,000 miles past the 36,000-mile bumper-to-bumper warranty. I am concerned the condition will degrade without warning and leave my family — including small children — stranded. The vehicle is scheduled for diagnosis at tracy Honda in [xxx] on xxx. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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Vehicle was stopped at a red light. Light turned green and the engine off would not restart the vehicle to go. Had to turn the car off, let reset, then restart while in traffic.

My 2020 Honda Odyssey ex-l intermittently fails to restart after the auto idle stop feature shuts the engine off at a red light or stop. This has happened probably 10 times in the past 6 months. In order to start the engine, I must recognize that the engine isn't starting, turn off the vehicle, and turn it back on, often 2-3 times before it actually starts. This leaves the vehicle stopped in a traffic lane at an intersection with traffic trying to pass, which creates a risk of rear-end collision or cars trying to pass me. Cars have gotten into near misses trying to pass me while my vehicle is inoperable. I have no warning lamps or messages before it happens. History: the dealer performed Honda’s idle-stop software update (service bulletin 23-008) in November 2024 at about 63,100 miles. The problem continues. The battery was replaced in December 2022, and the dealer’s October 2026 inspection rated the battery “good. ” (as did a second independent auto shop). At 93,331 miles in October 2026 the dealer documented the complaint, charged a diagnosis fee, and recommended replacing the starter motor at a cost of $954. 53 plus a diagnostic fee of $184. 95. I contacted Honda, which opened a case and offered only partial goodwill coverage. I am not aware of any additional recall or warranty extension covering this on my model. This appears to be the same condition as NHTSA investigation ea25004 (no restart after auto start/stop engages), which covers 2018-2025 Odysseys. The failure persisting after the software update matches the investigation’s finding that complaints continue after Honda’s countermeasures. I can share vehicle inspection records if helpful.

The most infotainment system does not work on our 2022 Honda Odyssey elite. The recall was completed for the most fakra cable system in October 2023 and shortly afterwards it was popping, cracking, losing connectivity, etc. And then worked on and off for the next couple of years which we put up with it. In may 2026, we brought it back to the dealer and they stated that they "straightened the cable" and it should work essentially. Now, in October / November 2026, it is not working 99% of the time. Therefore, there is no backup camera, navigation, hands free phone, climate control, music, or cabin watch (feature for Honda Odyssey elite van). This is unacceptable. There are so many Honda automobile owners that are experiencing this same issue.

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When idle start activates at a stoplight sometimes the car will not start when you take your foot off the brake. Car then takes several tries but it will start again. This is a dangerous situation and can lead to accidents. Only seems to happen randomly after the car warms up. Dealer did replace the battery but it did not fix the problem. My guess is the starter does not perform correctly after heat soak in the engine bay.

On October 14/15, 2026 it rained. At approximately 12:25pm on October 15, 2026 my power lift gate stopped working. It wouldn’t open with any of the controls. Upon further inspection we noticed the control module had water damage. We replaced the module on October 21,2026. It is still having issues. It opens with the controls but won’t close using the same controls. You have to manually close it.

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I believe the issue is the media oriented systems transport coaxial cable and fakra connector from the 2018-2023 recalls. The rear infotainment system does not load or display anything now. Same goes for the in cabin video and apple car play. They do not work anymore either. There were no warnings before everything stop working. It just stopped while drive home.

My 2023 Honda Odyssey experienced a serious malfunction of the auto idle stop system at approximately 32,987 miles. While stopped at a traffic light, the engine automatically shut off as designed but failed to restart when I attempted to move forward. This created a dangerous situation because my vehicle was unable to move when the traffic light changed, potentially putting me, my entire family at risk of a rear-end collision. The vehicle's battery had been replaced only a few months earlier, so this problem occurred despite having a relatively new battery. After researching the issue online, I found numerous reports of similar auto idle stop failures involving Honda Odyssey vehicles. This appears to be a recurring safety concern rather than an isolated incident. To my knowledge, there is currently no applicable recall providing a free repair for my vehicle. I believe this is a significant safety defect that Honda should investigate and address at no cost to affected owners. A vehicle should not unexpectedly fail to restart in active traffic, regardless of its age or mileage. I am requesting that NHTSA investigate this issue and determine whether a safety recall is warranted.

Front radar/camera failure. All yellow adas warning lights turn on simultaneously (lane keeping assist, adaptive cruise control, collision mitigation braking system, and road departure mitigation). Problem has been confirmed by dealer. Safety is at risk by not having this crash prevention features on.