Power Train Problems of Honda Odyssey - part 1

Vehicle has a prolonged hesitation to engage the transmission from a stop. When releasing the brake and pressing the accelerator, there is a significant delay, followed by a lurch forwards as the transmission engages all of a sudden. This frequently causes the vehicle to chirp tires, move suddenly into traffic or sluggishly move across traffic, all of which can be very dangerous. Honda dealerships report no awareness of this issue, though there are many similar descriptions on the internet.

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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.

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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.

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.

The vehicle idle start/stop feature has started struggling to reengage, particularly, it seems, in warmer weather. At least six times in the past two months (sept-oct 2026), the start fails completely during a drive. What this means is that the vehicle is stopped at a light and the start/stop kicks in. When I lift my foot off the brake to prepare to drive again, a warning flashes on (it disappears quickly but says something was detected) and the car shifts into park. I cannot put the vehicle into drive without turning off the car and turning it back on. This is very dangerous as I have been at the front of and in long lanes of traffic. Other drivers honk and try to go around me while I am getting the vehicle back up and running. The dealer has checked the car twice but cannot replicate the issue (both days they had the car, the temperature outside was below 80 degrees, and that seems to be a factor). Therefore, they cannot make or recommend any fixes other than turning off the feature everytime I turn on the vehicle.

My 2024 Honda Odyssey repeatedly failed to restart after the automatic idle stop system engaged at traffic lights. On numerous occasions, the engine shut off normally but would not restart when I attempted to resume driving. I had to shift into park and manually restart the engine before continuing. This happened regularly and created a safety concern because I could become stranded in traffic with my children in the vehicle. I eventually began manually disabling the automatic idle stop feature every time I drove because I was afraid the vehicle would fail to restart. I reported the issue verbally to a Honda dealership employee during a previous service visit and was advised to disable the automatic idle stop feature rather than continue using it. In October 2026, at approximately 21,000 miles, the vehicle displayed a low battery warning. Several days later, it completely failed to start after stopping at a gas station. Three separate jump-start attempts were unsuccessful. The dashboard lights and audio system worked, but the power windows stopped functioning. An authorized Honda dealership diagnosed a completely failed starter. The service advisor stated that the starter failure had also drained the battery. Both components were replaced under the factory warranty. The dealership stated that these repairs should resolve the previous idle stop failures, but the underlying cause of the premature starter failure has not been explained, and I do not yet know whether the problem is fully resolved. I am concerned about the repeated failures to restart in traffic and the complete starter failure at only 21,000 miles. I would like this investigated as a potential vehicle safety defect. I do not know whether the dealership retained the failed components for inspection.

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There appears to be an issue with the automatic start-stop system. Occasionally, the engine will shut off at a stop light but fail to restart as expected. To get the vehicle running again, I have to turn the car off completely, wait a few seconds, and then start it back up.

On numerous occasions, the start/stop idle system could not restart the engine. Happens often but not predictably.

Safety concern: severe transmission lag and hesitation on Honda 9-speed vehicles. The Honda 9-speed automatic transmission exhibits dangerous downshifting hesitation and delayed shifting while cruising at highway speeds. When attempting to pass another vehicle or accelerate quickly for extra power, the transmission frequently experiences a severe lag, causing a total lack of throttle response (a "no response" mode). This sudden loss of acceleration at highway speeds is highly alarming and significantly increases the risk of a rear-end or overtaking collision, creating an immediate safety hazard for the driver and other motorists.

9/22/2026- the car idle stop failed to restart at a intersection. 9/23/2026- the car did not start after stopping to get gas. I have not taken it to the dealer yet. Will do it as soon as I get a chance. When the idle stop fails the car shift into parking and only the accessories are on.

2018 Honda Odyssey ex-l, the vehicle consistently has a significant delay in acceleration. This is especially noticeable when starting from a stop or low speed and attempting to make a left turn across traffic. The accelerator pedal is pressed, but the vehicle sometimes provides little or no acceleration for 1 to 2 seconds. The vehicle will then begin accelerating, sometimes abruptly. This has created a safety concern because the vehicle can begin entering an intersection but fail to accelerate as expected, leaving it exposed to approaching traffic. The problem has occurs regularly and has been noticeable for an extended period. There are no intentional actions by the driver that would account for the delayed response. I am aware of two other Honda Odysseys doing the exact same thing. One being my neighbor who brought it up themselves and another, an individual at work. My neighbor has the same year and model. The other I am unsure about. This seems to be a consistent and likely widespread issue. The vehicle is a 2018 Honda Odyssey ex-l equipped with the 9-speed automatic transmission. I will be scheduling the vehicle with a Honda dealership and ask the dealership to diagnose this acceleration-delay problem.

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The vehicle's auto idle stop (ais) system engaged normally when coming to a complete stop at an intersection, shutting off the engine to save fuel. However, when attempting go through the intersection after the light changed to green, the engine failed to restart automatically. The vehicle completely lost power in an active lane of traffic, creating a safety hazard. The vehicle had to be shifted into park and manually restarted to clear the roadway. This failure appears directly related to NHTSA engineering analysis ea25004 regarding Honda/Acura auto idle stop restart failures.

The vehicle's auto idle stop (ais) system failed to restart the engine after engaging at a complete stop. The affected components are the engine, starter motor, and ais control software. The vehicle is available for inspection upon request. On xxx, at approximately 7:43 pm, the ais system engaged while I was stopped at the intersection of [xxx]. Upon releasing the brake pedal, the engine failed to restart. The vehicle became fully immobilized in an active left-turn lane with traffic behind me. I was required to shift to park and manually depress the start button multiple times to restore power. Multiple vehicles behind me began sounding their horns. A minor child was a passenger in the vehicle. This is not an isolated incident. The vehicle has been presented to howdy Honda, in austin, texas, for the same defect on three to four prior occasions. On the most recent prior visit, the dealer replaced the starter motor — the specific remedy prescribed by Honda technical service bulletins 23-008 and 23-009. The vehicle was returned to me as repaired. The failure recurred the same day. The defect has been confirmed and repair attempted by the authorized Honda dealership. The manufacturer has been on notice of this defect class-wide since at least 2018. Prior to and during failure events, the instrument cluster displays a red exclamation mark warning light and/or a "brake system" warning light. These warnings first appeared in conjunction with the initial ais failure events and recur with each subsequent incident. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The transmission has been having issues since it had 10 miles on it, it locks at certain speeds and wont go higher than 35, it misfires at lights, it will randomly make clunking sounds when driving and you can feel the vehicle throw you forward, ive taken it in multiple times, we have multiple cases open with Honda and they will not respond but it doesnt give any lights so dealership says they cant do anything even though theyve said they have felt it.

The van got stuck in park after backing out of a parking lot. Changed to drive but gear shift back to park. Have to restarted the car twice. People were honking nonstop. This is not safe.

We have been experiencing issues with the car stalling while driving. Most recently, the car lost power a few feet into making an unprotected left turn leaving us stranded in the middle of an intersection in a vulnerable position for several minutes. This was deeply unsettling to have happen while making left turn maneuver. It seems to be a failure of the auto start/stop function. After a few persistent trips to the dealer, they have now informed us that this is a known issue, but the parts are on backorder until January 2027. The workaround is turning off the auto start/stop function, but this button does not have an indicator light, is not always confirmed on-screen, and is re-enabled by default every time the car is started. It also appears that others have complained about this issue, and this deserves to be upgraded to a recall. It is unacceptable that a manufacturer would know about an issue with serious safety implications and not notice owners. This could have easily caused a crash and it is happening to others. This specific van is used to transport a disabled family member and outside aides often drive him in this car. We do not feel comfortable with a non-persistent workaround while others are driving this car while we wait for this part. - auto start/stop and drivetrain, available for inspection - car stalls during maneuvers after stopping - problem was reproduced multiple times. Dealer is aware. - inspected by dealer. - no warnings, messages, or symptoms.

The vehicle came to a complete stop at a stoplight at a busy intersection and the auto idle stop feature engaged. When the brake was released to resume driving, the engine struggled to restart, and then stalled completely in the middle of traffic. The vehicle did not automatically restart upon releasing the brake, and had to be placed into park, turned off completely, and then restarted manually to regain vehicle control. This has happened several times. There have also been instances where the vehicle did not stall completely, but bucked violently when the auto idle stop feature restarted the vehicle.

When attempting to accelerate after completing a stop, there was no response from the vehicle when the accelerator was pressed for 2-3 seconds, then the vehicle suddenly lurched violently forward and hit the rear end of a vehicle in front causing severe damage to the cars.

The contact owns a 2025 Honda Odyssey. The contact stated that while coming to a complete stop at a red light or a stop sign, the vehicle stalled and shut off unintendedly. There was no warning light. The vehicle was restarted. The manufacturer was notified of the failure and stated that there was an ongoing investigation associated with the failure. The vehicle was not repaired.

My 2024 Honda Odyssey has repeatedly failed to restart after the auto idle stop system shuts the engine off while stopped at a red light or in traffic. Normally, the engine should automatically restart when I release the brake, but on several occasions the vehicle completely shut down and I had to manually restart it. During one incident, the vehicle would not restart for approximately 1–2 minutes despite repeated attempts. This left the vehicle disabled in traffic and created a serious safety concern. The problem has occurred multiple times.

My vehicle intermittently shifts from normal automatic drive (d) into s mode without any intentional driver input. I do not touch or activate the steering-wheel paddle shifter when this occurs. Searching on reddit and other forums I see many other drivers have the same issue. The problem appears to happen primarily after coming to a complete stop, such as at a traffic light or stop sign. When I then press the accelerator to proceed, the vehicle may have very little acceleration because it has unexpectedly entered s mode. This has occurred while I was attempting to turn or proceed into traffic and has nearly caused an accident on multiple occasions. The issue is intermittent and cannot be reproduced on demand. However, it has happened multiple times under similar circumstances. I am certain I did not intentionally activate the paddle shifter. I am concerned this may be a safety defect involving the electronic shift control, paddle shifter, transmission controls, sensors, or related software. An unexpected change in transmission mode immediately after stopping can create a dangerous situation because the driver expects normal automatic operation and acceleration when entering an intersection or traffic. I am requesting that NHTSA document this complaint and investigate whether this is a safety-related defect that may affect other vehicles.

My car has stalled numerous times when it stops, and the engine goes into the fuel saving off mode. It stalls when I try to drive away as my foot comes off the brake. This has happened more times than I can count. In addition, as a side not I rented another 2025 Honda Odyssey, and it also died when trying to go. The dealer has supposedly driven my vehicle when we bring it in but never has reproduced it according to them. They did admit that they knew about it but had no solution at present. There only response was to say to turn the engine shut off switch to disable it. There are warning lights after it dies but not before.

When driving the vehicle stutters. Up to 9 warning lights come on and the vehicle goes into limp mode while driving and will not shift. Rpm continues to go up. When scanned the vehicle shows codes that are associated with Honda warranty extension 21-010 however, Honda consistently denies coverage for this vehicle.

My van will stall at red-lights. It started three weeks ago. The car is a year and a half old. The auto- idle stop system is activated. We stop at a red light. Car stops. When we go to start car dings and thankfully has started 3 times. This time, the car made a ding and did not re-start. I was stuck at a now green light and couldn't move. The dash flashed hit the brake to re-start. I did numerous times. I couldn't get the car to switch to park or drive. I tried switching the car on and off and couldn't get it restarted. I was disabled for about 2 minutes before it kicked back on. My kids were in the car and this scared me.

The car on a weekly basis or almost every time it is driven. The car jerks when driving at low speeds. This is a safety risk when driving for vehicles in front or behind me, as the car jerks forward. This has been mentioned to the dealer, but they stated a charge of 180 usd will be incurred for diagnoses. If you look at the NHTSA complaints database there are numerous complaints similar to what I am experiencing from other owners stating the same issue of jerkiness on the Honda odessey. I am surprised there is no recall on this. I put the date in down below but it happens almost every time the car is driven.

For several weeks, my 2025 Honda Odyssey, with approximately 30,000 miles, had been jerking while being driven. An independent mechanic believed the problem might be transmission-related. I brought the vehicle to an authorized Honda dealership, reported the jerking and specifically stated that I suspected a transmission problem. The dealership recommended and performed a transmission-fluid service. On August 24, 2026, at approximately 4:00 p. M. , my wife was driving on the new jersey turnpike with our children when the vehicle suddenly jerked and behaved as though the transmission was attempting to engage reverse while the vehicle was moving forward. This created an immediate loss of predictable vehicle control and nearly caused an accident. My wife managed to pull into a parking lot. The vehicle then would not move in reverse and displayed a transmission-system warning. The vehicle was returned to the authorized Honda dealership. The dealership subsequently determined that the transmission required replacement, and it is currently being replaced under warranty. No collision or physical injury occurred, but this sudden transmission malfunction placed my wife, our children and other motorists at serious risk. The vehicle is currently at the dealership, and the failed transmission may be available through the dealer or manufacturer. I am requesting that NHTSA investigate whether this is a safety defect affecting the transmission or powertrain in the 2025 Honda Odyssey.

My name is [xxx], we bought a brand new 2019 Honda Odyssey elite, we have had problems with this vehicle since day one. They have lied and covered up the issues with this vehicle starting with the infotainment center, transmission slippage, fuel pump and the front camera has been overheating giving us the message that it is overheating and all the lights come on. They have stalled us on these issues and now the extended warranty is up and we want something done about this. We have babied this vehicle the entire time since new and it seems like one problem after another, at this point we are very disappointed from the way we are being treated from Honda. The latest is the front sensor on the front mirror that pops up all the lights on the dash, no one seems to be able to duplicate the problem, now they are on all the time and conveniently the extra extended warranty we bought have since expired, there was a lot of recalls on this vehicle and no one ever seems to be able to send us the recall letters. We really thin the mirror sensor and the transmission are definitely safety issues especially when the mirror shuts all the safety off. The transmission shifts hard at times and we pray that Honda will step up to the plate and do the right thing and fix the other recall issues on this same vehicle as well. We have other Honda vehicles that we have not had any issues with, we just can't understand why we are being treated in this manner, we just want the vehicle fixed. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The vehicle experienced multiple sudden engine stalls while driving in traffic. Specifically, the engine shut off unexpectedly and the transmission automatically shifted into park (p) while on the road, leaving the vehicle immobilized and unable to be manually shifted out of p. Restarting the vehicle was extremely difficult, which created a severe safety hazard and nearly caused a rear-end collision. The vehicle was inspected and confirmed by an authorized Honda dealer that the starter failed. The starter has since been replaced. The failed component is available for inspection upon request.

While stopped at a red light or intersection, the vehicle's auto idle stop feature engages and shuts off the engine as designed. However, on multiple occasions, the engine has failed to automatically restart when the brake pedal is released. The vehicle remains stalled and unresponsive in the middle of the intersection or traffic lane, creating a safety risk to myself and other drivers, particularly at busy intersections. In some instances, the vehicle needed to be fully powered off and restarted before it would move again. This is a known and widely reported defect affecting Honda and Acura vehicles with the auto idle stop system, currently under NHTSA engineering analysis ea25004. The problem has occurred repeatedly and unpredictably, with no consistent warning beforehand. The vehicle and its auto idle stop system are available for inspection upon request. The problem has not yet been confirmed by a dealer, though I intend to bring it in for diagnosis. There were no warning lamps or messages before the failures occurred; the only symptom was the engine simply not restarting after an automatic idle stop.

While at a stop light on a major road, the vehicles auto start stop engaged. Upon the light turning green, I released the brake and vehicle failed to restart. The vehicle put itself into park and flashed a warning message "problem detected. . . . . " . I pressed the start button, and at first the vehicle failed to start, making a clicking sound, consistent with a dead battery or starter. I had to press the start button 4 times before the vehicle restarted and I could proceed. I was extremely concerned as I had my wife and three kids in the car, unable to move forward on a major roadway. I have an appointment at the dealer for this Friday.

My transmission has almost completely went out.

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While driving the car lurches as it shifts gears. This had gone on for quite some time but no codes have been thrown. This last time the car lurched so badly at the beginning of acceleration that I thought it was going to stall. It did not, but lights began flashing on the dash and when codes were (finally) thrown I was told I needed a new transmission altogether.

After driving for awhile, stopped in a store for a minute and came out and my van barely started. Made my next stop a minute down the road, and when I came out the car wouldnt turn over. Let it sit for a minute and still heard the start click once and nothing. Let it sit for 10 15 mins then tried to start it and it worked. Had battery and alternator tested at auto parts store and both ok. After reading some forums and researching, I see that it is an overdraw from the auto start feature. I also saw the model of starters on my year of van were only used one year, so it seems like its a problem Honda has known about. Im seeing a lot of these issues, and the guy at the auto parts store even knows about it, so it is something that needs a recall. Clearly these starters are a problem. My van just rolled over 36k miles because we drive a lot so its not under warranty still.

On 2 occasions now automatic start/stop system has failed to restart. First was approximately 5 weeks ago and second was Monday 3 Aug 2026. Dealer on first occurrence said there was a loose wire. Have not been to dealer on 2nd occurrence yet. Situation in both cases is the vehicle was seemingly operating normally with no warnings displayed and I stopped in traffic. When traffic cleared and I tried to proceed; the vehicle was non responsive and would not start when I activated the normal start sequence.

The vehicle would not accelerate over 40mph, we took the vehicle into the dealership for what we thought was a failed fuel injector, upon inspection they found metal shavings in the oil and mentioned the engine is not repairable and would need a whole new replacement. We had this vehicle 9 months. Upon investigation there was a known recall that is identical to the issues we are experiencing. The whole engine is failed and we cannot utilize it. It was inspected by the dealership. The check engine light is illuminating, and does not increase in speed. My family and I were unable to drive at a reasonable speed on the highway once it failed.