Engine And Engine Cooling Problems of Honda Odyssey - part 2

?while driving my 2019 Honda Odyssey at highway speeds on the 60 freeway, the vehicle experienced a sudden and total engine failure/stall without prior warning. I had all my kids in the car as well. Chp advised to call Honda the sudden stalling resulted in an immediate loss of engine power, creating an unsafe scenario on a high-speed freeway. I was forced to navigate the vehicle across traffic lanes to pull over onto the shoulder safely.

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This is at lesat the second time that our odessey has failed to restart at an interesction following the start-stop system turning off the engine the when stopped at a red light. After a couple of moments of trying to restart, it started again.

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When stopped at a red light today, our minivan's auto idle stop (ais) system stopped the engine with the brakes depressed (as advertised). Once the light turned green, the driver released the brake to re-engage the motor, but the starter did no restart the minivan and a battery light flashed on. The start button had to be pressed several (~4) times to get the motor to restart and to turn the battery light off.

The idle start stop system on my 2024 Honda Odyssey sometimes works, and then other times will leave me stranded at a stoplight, making it a grave safety concern. After the engine does not restart you have to turn the car completely off put it in park turn it all the way back on and then continue driving. This is not related to any of the climate controls being onto high or energy being consumed. It seems to be a manufacturing defect.

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Auto idle stop/start system malfunctions intermittently. The car will shut off at a red light/stop sign then will not automatically restart. Will require shifting to park and restarting the car at the intersection.

This has been addressed by the dealer once before and the starter was replaced, however the problem is happening again. The auto start/idle feature will not start the car back up while stopped on occasion. For instance, yesterday while stopped at a red light the auto idle/start feature kicked in, as expected. When releasing the brake to drive when the light turned green the car beeped and would not start again. We had to power the whole van down at a busy intersection and restart. Thankfully it started. We didn’t catch what warning lights flashed when the van beeped, but no warning lights were present before the issue. As mentioned, this has happened before to the point the dealership replaced the starter. But unfortunately, it is happening again. The van often has a rough start as well when using it, but not every time.

My vehicle has experienced repeated unexpected engine shutdown/no-start events, creating a significant safety hazard. The engine has unexpectedly shut off or failed to restart while stopped in traffic and while entering traffic, resulting in a sudden loss of propulsion. On one occasion, the vehicle would not restart for approximately one minute. The vehicle was inspected by an authorized Honda dealership, and the starter was replaced under warranty in July 2025. The repair did not correct the problem. Since that repair, the same failure has occurred multiple additional times. The issue has now occurred at least six times over approximately one year. Because the condition is intermittent, the dealership has not permanently identified the root cause. The vehicle is currently being returned to the dealership for further diagnosis, and I have requested that the matter be escalated to Honda technical assistance (tech line) and Honda engineering. This defect creates a serious safety concern because the vehicle can unexpectedly lose power while in or entering traffic, increasing the risk of a collision. There were no consistent warning lights or messages before the failures, and the condition occurs intermittently without warning. The vehicle remains available for inspection.

The connecting rod bearings failed, resulting in engine damage. The failed bearings, crankshaft, and oil pan debris have been retained and are available for inspection on request. The vehicle developed a loud ticking noise from the engine. A Honda dealer initially diagnosed the noise as coming from the timing belt tensioner and replaced the timing belt and tensioner. The noise was unchanged after that repair. The dealer then traced the noise to the bottom end of the engine and performed a teardown on 07/16/2026, which confirmed connecting rod bearing failure with significant metallic debris throughout the oil pan. The dealer documented the failure with photographs. The engine is not driveable. The problem has therefore been confirmed by an authorized dealer through disassembly. The manufacturer has been notified but has not physically inspected the engine. There has been no police or insurance involvement. Warning symptoms: an audible ticking noise from the engine was the only symptom. No warning lamps, dashboard messages, or other indications appeared at any point before or during the failure. Safety: this failure mode is the subject of NHTSA preliminary evaluation pe25008, opened 08/20/2025, covering connecting rod bearing failures leading to complete engine failure in the 3. 5l v6, including my2018-2020 Odyssey. It is also the failure mode described in recall 23v-751, which states that engine failure may cause loss of motive power and increase the risk of crash and fire. My vehicle falls outside that recall's build range and the manufacturer has declined coverage on that basis. Had the bearing seized while driving rather than being found during shop diagnosis, the engine could have lost power or stalled without warning. This vehicle carries family passengers on highways. No crash, fire, or injury occurred.

Completely shuts off during an idle stop at a traffic light.

2025 Honda Odyssey. When the auto start/stop engaged, the engine failed to turn back on when the brake was released. It left my family stranded at a stoplight for multiple minutes before my wife could get it going again. After going rounds with the dealership and Honda not being able to 'recreate the problem', they finally put in a new starter and the van worked for the next year. Fast forward one year later and it did the same thing. Now the dealership cannot recreate it again, and I am concerned for the safety of my wife and kids. Brand new vehicle should not do this and Honda is not doing anything to rectify the situation. I have read there are over 2 million complaints on this issue on this website but don't understand how a recall has not been implemented.

Un known.

The vehicles auto start/stop system has failed to restart the vehicle at stop lights multiple times, requiring a full system reset. At least 2 of those times it has failed and would not restart with a the button press reset.

My 2024 Honda Odyssey has repeatedly failed to restart after the auto idle stop system shuts the engine off at a red light. When I release the brake or press the accelerator, the engine does not restart as it should. The vehicle then shifts into park or instructs me to place it in park, and it is difficult to restart using the start button. This has left the vehicle disabled in an active traffic lane and creates a serious risk of being struck by another vehicle. I have been stuck at a red light with people honking at me and haven't been able to start the car for up to a minute. The problem is intermittent, and I do not know whether it is caused by the engine, electrical system, battery, starter, software, or power train. The auto idle stop system should not shut the engine off if the vehicle may be unable to restart.

The vehicle is a 2020 Honda Odyssey. A recurring and dangerous safety failure occurs involving the auto idle-stop system. With the system enabled and the vehicle at a complete stop, the engine shuts off as designed. However, upon depressing the brake pedal to resume driving, the engine severely struggles to restart and completely fails. Simultaneously, the vehicle immediately and automatically shifts itself into park, and the entire dashboard display illuminates with all available warning icons and messages. This malfunction creates an immediate, high-risk safety hazard. When the incident occurs, I am trapped, locked in park, in live traffic lanes, sometimes at busy intersections or during left-hand turns. It is impossible to shift back into drive or quickly restart the engine. I am forced to remain stationary in traffic for multiple minutes until the system allows me to cycle the ignition completely off and then back on to attempt a full restart and shift back into drive. This leaves my vehicle, my passengers, and other drivers vulnerable to rear-end collisions.

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Stopped in heavy traffic in a four lane highway. Auto start/stop shut the engine down as expected. Traffic ahead cleared. I took my foot off of the brake to step on the gas. The engine didn't start up, and the radio and all lights inside went blank. Traffic behind me approached at about 45 mph. And were swerving around to avoid hitting my dead vehicle from the rear. I pushed the start button. Nothing. Again. Nothing. Several times more with my foot on the brake, or off the brake. Nothing. I put it in park and kept trying the start button. Finally it started, the radio and dash display came on, and from then on it operated as usual. Scared the hell out of us. There was no warning that anything in the car was malfunctioning before this happened. Took it to the dealer. They looked it over, kept it overnight. Told me the next day that the battery can get drained too much if the air/cond is on max and the start/stop feature doesn't like that. They used a machine to drain the battery and recharge it and they tell me now that it should be good. I don't believe one has to be aware not to use the air on max while the start/stop is enabled. I'm afraid to drive the car now! our lives were in danger.

My 2019 Honda Odyssey stalled at a red light, then had an extended crank/no-start. It later hesitated and almost stalled while driving around 40 mph, and stalled again when I got home. The dash showed emissions system problem along with vsa, eps, brake system, brake hold, hill start assist, and road departure warnings. Please check open recalls, especially the fuel pump recall, scan all stored and pending codes, test battery and alternator, and check fuel pressure and fuel pressure leak-down.

On multiple occasions, after the engine auto start/stop has turned the engine off at a stop, the engine fails to restart. This leaves the car stalled in the roadway. This has led to multiple unsafe situations as traffic flow is disrupted must divert around the stalled car in the middle of the roadway. There have been no other warning signs or symptoms leading up to this issue. The vehicle has not yet been inspected, a inspection at a Honda service center is scheduled for next week.

My 2021 Honda Odyssey touring has experienced a severe engine stalling defect that creates an immediate traffic hazard. On multiple occasions during warm weather conditions, the auto idle-stop system has engaged at a stoplight, but the vehicle completely failed to restart automatically when pressing the accelerator. Instead, the engine completely stalled out mid-drive, leaving the vehicle stranded in active traffic and requiring a manual cycle of the ignition button to turn back over. There were no dashboard warning lamps, error messages, or check engine lights prior to the engine stalling. The vehicle was taken to an authorized dealership (Honda of middleburg heights) for an emergency safety evaluation. The certified technician physically tested the starting system and explicitly confirmed the physical hardware failure on the invoice, stating: "the starter motor can be heard cranking slower than usual during start up. Recommend replacing the starter motor and relays. " despite this official mechanical diagnosis of a failing starter component causing an immediate traffic stall, regional management issued a flat refusal of coverage because my specific VIN was omitted from the automated database recall screens for service bulletins a23-008 and a23-010. I am filing this complaint to ensure federal investigators document this rigid VIN exclusion loop under the active NHTSA engineering analysis ea25004.

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1st concern- while in an intersection the van powered off after lights on dashboard said something about a system failure. I tried restarting vehicle several times as I was really nervous being in an intersection and it finally started after a few tries. This same thing happened l, to my husband, while parked in our garage about to leave. 2 nd concern- last week on xxxi drove to [xxx] for a short vacation and while at a stop the dashboard had multiple warnings going off 1) electrical power steering system problem 2) hill start assist problem. Vehicle may roll upon brake release 3) adaptive cruise control problem 4);power steering system problem. I called roadside assistance and we waited about an hour and a half. He used a tester and said all was coming back fine but to take van to a dealer the next day. We took it to egg harbor Honda dealership and they said if the codes have cleared, which they had, then there is nothing they can do and to just take it to our dealer when we return home. I have an appointment for tomorrow at xxx at 915 am at [xxx] of Honda in abington, PA. I have pictures of all the "2nd concern" warnings. During the 1st concern I was driving and did not feel comfortable capturing the warning lights with my phone camera. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Multiple times the engine has totally shut down due to the auto idle stop system power loss. I have had the battery replaced a couple times and had the Honda dealership do the software update and I'm still having issues. This is a major safety issue as the car unexpectedly shuts down and takes a minute or so to get started again causing traffice backups.

I was waiting at a stop light. The idle system kicked and the vehicle turned off, as expected. Upon lifting my foot off the brake, the vehicle failed to start and the car went into park. I was unable to restart the car after holding the brake pedal down and pressing the start button multiple times. After many failed attempts, I shut off the power to the vehicle, waited a min or so and restarted the vehicle. I then put the car in drive and continued thru the intersection. This was in a busy intersection and could have easily caused an accident, but thankfully it did not. This is the 3 time this has occurred with this vehicle.

While stopped at a traffic light my vehicle went into auto engine idle stop mode. When the light turned green, I removed my foot from the break, but the engine failed to restart. I had to shift the car to park and fully restart the engine.

I own a 2018 Honda Odyssey ex-l (VIN [xxx]). The vehicle experienced a sudden loss of power and entered limp mode, with multiple safety and driver-assistance systems shutting down at once (adaptive cruise, braking assist, lane/road departure mitigation, eps, etc. ). A Honda dealer (allen Honda, college station, TX) retrieved dtc p0369 and documented that the front camshaft is worn and has thrust forward, contacting the camshaft position (cmp/tdc) sensor and damaging the thrust plate. The dealer is recommending an internal engine repair costing several thousand dollars. I am very concerned because Honda has already acknowledged serious engine defects in this same j35 v6 family under recall 23v751 (connecting rod bearing wear leading to engine damage and stall) for 2018–2019 Odyssey, yet my dealer states my VIN is “not part of the recall” and that this is a “separate issue. ” in practice, I am seeing a major internal engine failure that causes sudden derate and disables multiple safety systems, but I am being told there is no recall coverage or assistance simply because my individual VIN falls outside Honda’s current recall production range. I am requesting that NHTSA review this incident as a potential recall exclusion problem: owners with the same engine family and serious internal failures are being denied recall coverage on a technical VIN cutoff, even though the safety consequence—loss of power and shutdown of critical safety systems while driving—is similar to the failures already recognized under recall 23v751 and the ongoing engine defect investigation. I believe this situation may warrant expansion of existing recall coverage or a new recall campaign for currently excluded vins like mine, and reimbursement for owners who have already paid for these repairs. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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The van is experiencing the auto stop-start defect causing major safety issues for my family. The car stalls randomly at stop signs and stoplights and is unable to be restarted quickly, creating a major traffic and safety hazard. The car often will not turn on at start up. The dealer stated that it needed a new starter. Then said that Honda would not replace the starter until a tech looked at it. Then after several weeks still had not moved forward getting a tech. Then said to bring the van in for them to keep until they could get a tech, and offered a small car without room for the kids as a loaner for the indefinite amount of time they want to keep the van. There were no warning lights when it has happened. This issue is already being investigate by the NHTSA - investigation number ea25004. This is a known issue for Honda and I am unable to get a safe vehicle or get my vehicle fixed. Below, I have to choose a date for the incident, but this is ongoing and has happened on more dates that I can possibly log. It happens weekly, if not daily.

I have been in my vehicle at a red light and my van will not start. The start button is pressed and the vehicle makes clicking noises or won’t make a sound at all. Finally it starts.

2025 Odyssey with 19k miles; starter failure; after running/ driving vehicle continuously for 45 minutes in 80(f) degree weather, stopped and turned off vehicle completely. Tried restarting after 5 minutes, engine turned over twice, but did not start, and auxiliary features stayed on as if vehicle was running. Attempted again, heard click, as if engine attempted to turn, but no start. Checked engine visually, noticed engine bay was hot, but fluid levels all were within recommended ranges based on container-marked levels. After turning vehicle off, waiting 10 minutes and using battery jumper, engine started and stayed running. This is concerning as the vehicle features an auto-start feature that can turn off my vehicle in traffic, and leave me stranded at an intersection or worse if the starter fails.

While driving the engine unexpectedly, it was having problems going over certain rpms. It sounded very loud. . Brought it into Honda of denton, texas. They examined it and said there was metal shards in my oil in my engine that something was broken. I needed a complete new engine. . 2019 Honda has a bearing recall for the engine when it fails it causes metal shards in the engine. They told me that my VIN was not covered in this recall, and they could not repair it even though this exactly what has failed in my engine. .

While the start stop feature is active, there have been several times where the van will not restart at a stoplight. In some cases, I have had to turn off the a/c, or other electrical systems to allow the car to restart. This has happened in traffic and caused several backups while I tried to restart the car. Took this van to the dealer and while they checked the systems they did not find any issued. As we progress through summer and into fall/winter, I do not want to have to worry about this in poor weather.

The vehicle suffers from an intermittent electrical/charging and starting system failure tied to the auto idle-stop feature. While driving and coming to a stop at active traffic lights, the engine stutters and completely shuts down. It then fails to automatically restart, requiring multiple manual attempts to crank the engine back over. This creates a severe safety hazard, leaving my family suddenly stranded and vulnerable to being rear-ended in live traffic. The vehicle also intermittently struggles or takes multiple attempts to start after being parked in lots. ?the issue has been brought to two separate authorized Honda dealerships within a 30-day window. The first dealership diagnosed a failed battery and replaced it under warranty, but the stalling recurred. The second dealership held the vehicle for five days for diagnostic testing but stated they could not replicate the defect, returning it with no repairs made. Immediately upon picking the vehicle up from the second dealer, it suffered another starting failure in a parking lot. No warning lamps or error messages appeared on the dashboard prior to these failures. The components are intact on the vehicle and available for inspection upon request.

With the auto start engaged, the car has stalled several times in the middle of intersections with my family in the car. Over the course of 12 months, this has happened 5-6 times. In each case, we have to shut the car off and try to frantically turn it back on. Sometimes this takes a few tries to get it to start. It’s frustrating that there is no option to permanently turn off the auto start feature. However, within the past 2 months, there have been 3 times that the car won’t start right away from an off position. It takes a few tries to get the engine started. The van is less than a year and a half old and only has 18,000 miles on it. This shouldn’t be happening, particularly in the middle of an intersection if I forget to turn the auto start off. Honda has not replied to my inquiries and the dealership can’t/won’t do anything about it because they can’t replicate this issue.

The vehicle stalled at a traffic light and would not go into park or shut down to restart for about a minute. There were no warning signs or warning lights. It is a safety issue due to this potentially happening in the middle of an intersection while waiting to turn. The vehicle is being taken to the dealership on Wednesday, July 1st.

The idle restart does not always restart the car following an automatic idle engine shutdown. The result is that the car is stalled at an intersection or other areas where the brake is applied, the engine shuts off, but the car is still in drive. Only fix found is to shut off the car systems and hit the ignition to get the car started again.

I own a 2026 Honda Odyssey elite. On multiple occasions, the auto idle stop system shut the engine off while stopped at a traffic light. When I released the brake pedal to proceed, the engine failed to restart, leaving the vehicle disabled in traffic. I was forced to shift the vehicle into park and manually restart the engine using the start/stop button. This defect has occurred multiple times. I first reported the issue to my Honda dealership on June 2, 2026. After two visits where the dealer was unable to duplicate the concern, I captured the failure on video. During my third repair visit, the dealership's engineer personally experienced the failure twice while testing the vehicle. Honda customer relations opened a case and worked with the dealership. The dealership ultimately replaced the battery but advised me that this was only the next diagnostic step and not a confirmed root cause of the failure. This defect creates a significant safety hazard because the vehicle can become immobilized in an active traffic lane after the light turns green, exposing occupants to the risk of being struck by other vehicles.

The automatic engine shut off at stop doesn't always restart engine when moving again. This has happened several times where the engine doesn't restart after the engine shut off is engaged. This is the same issue as reported in NHTSA action number: ea25004.

When I come to a full stop and the idle stop feature engages, sometimes the engine will not restart. I get a message saying to press the button to start the engine, but it does not start after doing that either, so I have to shut the car off and restart it. There are a bunch of lights that flash when this happens.