Engine And Engine Cooling Problems of Honda Odyssey - part 1

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.

See all problems of the 2025 Honda Odyssey 🔎.

I am reporting a severe engine issue on my 2019 Honda Odyssey that matches the exact failure profile of NHTSA recall 23v-751 and the ongoing investigation pe25008 / rq24-013. While driving, the vehicle randomly began experiencing a loud, progressive metallic knocking and ticking noise from the engine, sometimes it was a squeal, the engine stalled while in motion and wouldn't drive anymore. This presents a severe safety hazard, as an unexpected engine stall or failure while driving increases the risk of a crash. My VIN currently shows as "excluded" from recall 23v-751. However, given that this vehicle has the exact same 3. 5l v6 engine and is exhibiting the textbook symptoms of premature connecting rod bearing wear and crankshaft-related failure, I request that the NHTSA review this case to expand the recall parameters to include my vehicle batch.

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I am submitting this complaint regarding a serious safety issue with my Honda's auto idle stop/start system. On multiple occasions, while stopped in traffic or at an intersection, the auto idle stop system has automatically shut off the engine as designed. However, when I release the brake and attempt to proceed, the engine fails to restart. The vehicle becomes stalled and immobilized in the middle of active traffic. I have been stuck at traffic intersections because of this failure, creating a significant safety concern. When the vehicle fails to restart, surrounding traffic expects the vehicle to move when the light changes, while I am unable to accelerate or safely clear the intersection. This creates a risk of a collision, particularly from vehicles approaching from behind.

See all problems of the 2024 Honda Odyssey 🔎.

When traveling to multiple destinations, upon attempting to start the van, it will not start. This is also the case with the auto start/stop program. The van's engine will stop at dangerous locations, such as a busy traffic light, or at any other stop where the engine turns off. There were no warning lights, but the van would only start if tried multiple times. This is incredibly dangerous and nerve-wracking.

With auto idle stop enabled, the engine frequently fails to restart upon brake release. To restart the engine, I have to turn the car off and back on again using the engine start button. This has happened many times at traffic lights if I forget to disable the auto idle stop. Twice in the last month I have almost been hit by the car behind. The Honda dealership was unable to recreate the issue. It is apparent that many other new model Honda Odysseys are also experiencing this same issue from an online search, leading me to suspect Honda has a hazardous design deficiency.

This car has on multiple occasions now just turned off the enginee when stop at a stop light and the enginee idle feature is on. It makes you restart the car when you are trying to go from a stop light this is dangerous and causes angry driver behind you. I took my one year old car to the Honda dealership and they said they couldn’t help. This is a safety issue. It’s happening more and more frequently.

Multiple instances of the auto start not reengaging while stopped at intersection. Have to completely shut off and restart vehicle.

During auto idle stop (usually happens after more than 5 seconds in idle stop) the van will stall (put itself in park and engine turns off). Restarting takes approximately 30 seconds because the van will not turn back on right away no matter how many times the ignition/start button is pressed. I was advised by the dealership we purchased the van from, to allow it to happen more frequently so that it can be properly diagnosed so we have not been turning off the auto idle stop. But I feel this is a safety issue and should be addressed immediately.

2025 Honda Odyssey - seems to have issue with auto-start auto-stop. Frequently, the minivan is unable to turn back on after it auto-turns off when stopped at a light or somewhere. Creates very dangerous situation because I am stuck as the driver, and the car is unresponsive. You have to put car in park, turn off the car, turn it back on, put in drive. People are honking and in one case we almost got hit because it was a stop around a turn and we couldn't move. I've checked for recall and it's not there. I'm taking it in to Honda dealer as soon as available. It's not everytime, but it's frequent. Probably happened 4 times in last two weeks.

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).

My auto start-stop idle function is malfunctioning. When I stop at a traffic stop light or the car comes to a stop, the car completely stalls when pressing the accelerator to go forward. This is resulting in very confusing and chaotic situations in the middle of the road with cars behind me honking. I need to turn off the engine completely and then wait a few seconds and then restart the car before going again. This is creating hazardous conditions on the road for my family and other cars.

The contact owns a 2020 Honda Odyssey. The contact stated that while driving 45 mph, the contact heard a knocking sound coming from the engine, and the vehicle went into limp mode with the low oil warning light illuminated. The contact became aware of a burning odor coming from under the hood, and the vehicle needed to be towed. The vehicle was towed to the dealer, where it was diagnosed and determined that the connecting rod bearings had failed and the engine needed to be replaced. The vehicle was not repaired. The failure mileage was approximately 50,000.

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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 fuel injectors are failing which is causing a safety concern with regards to moving the vehicle. There was a warranty extension on these items that does not go far enough to remedy the issue. The components have been inspected and confirmed by the burns Honda dealership in marlton, NJ. Because the vehicle does not consistently accelerate, it is a safety risk.

See all problems of the 2018 Honda Odyssey 🔎.

1. Component failed: the low-pressure fuel pump failed. The vehicle is currently sitting at my residence and is available for inspection upon request. 2. Safety risk: the vehicle stalled completely while driving, causing an immediate loss of propulsion on a public road, creating a severe collision risk. 3. Confirmation: the problem has been pulled and confirmed by an independent service center (autozone diagnostic scan tool), which pulled a code to replace the fuel pump. 4. Inspection: the component has not yet been inspected by the manufacturer, police, or insurance representatives, as the manufacturer is currently refusing to authorize an inspection due to a salvage title. 5. Warning lamps/symptoms: immediately prior to the stall, a complete cascade of warning lights appeared on the dashboard simultaneously, and the vehicle sputtered aggressively upon attempting to crank and restart. Assessment: this is the identical, textbook physical failure condition of NHTSA campaign 23v-858 regarding defective factory-installed denso fuel pumps in 2018 Honda Odysseys. American Honda corporate is using an automated salvage title database filter as a pretext to deny mandatory federal safety recall remedies on a vehicle with zero structural fuel system damage.

The auto idle stop system intermittently fails to restart the engine after the system shuts the engine off while the vehicle is stopped. When this happens, the vehicle remains disabled and I have to completely restart the vehicle before I can continue driving. This has happened twice while stopped in highway traffic. On both occasions, traffic began moving while my vehicle failed to restart, creating an immediate crash risk and nearly resulting in collisions from vehicles behind me. The problem is intermittent. The vehicle has previously been brought to a Honda dealership for this concern, but the failure continues. I have contacted the dealership again and have also contacted the manufacturer regarding the issue. There were no consistent warning signs before the failure. The problem occurs after the auto idle stop system activates. Because the vehicle may fail to restart unexpectedly in active traffic, I am concerned that the condition presents a serious safety risk to the occupants of the vehicle and surrounding motorists. The vehicle is available for inspection upon request. This condition appears consistent with NHTSA engineering analysis ea25-004 involving auto idle stop no-restart complaints on Honda Odyssey vehicles.

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.

Vehicle auto engine stop engages at intersections. Car fails to restart when system is supposed to reengage. The vehicle then has to have ignition restarted causing unanticipated dangerous situations. There is no warning that the system will fail to reengage and the problem is intermittent. This has happened several different times causing dangerous traffic hazards.

Stopped at a light, auto idle stop engaged, engine shut off normally. The moment I pressed the gas, everything died — engine and all electronics. I pressed the start button two or three times with no response, then it finally started. It was still in drive. The hazards wouldn't turn on right after, then everything gradually came back to normal.

My 2025 Odyssey stalls. The engine will turn off when I am stopped and will take at least 2 retries to get the engine to turn over. Once I was at a stop light on an interstate off ramp when it stalled. Once I was at a stop sign when it stalled. Twice I have been unable to start it at a store. I will settle the brake & push the start button & nothing will happen. I will try again. I have to take my foot fully off the brake, wait a few seconds, & try the steps again. It eventually starts, but I'm afraid that someone will hit me and hurt my children or myself as I'm a sitting duck.

Crankshaft/rod bearing defect that is causing an audible knocking noise in the engine and located metal shavings in the oil.

Sitting at a light, the auto stop system activated and shut the engine off. When the light turned green, I took my foot off the brake and the engine failed to. Start and the entire electrical system shut off. The card was completely dead. I sat there for several minutes and I was able to restart the car.

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.

While driving my 2026 Honda Odyssey, I stopped at a red light and the engine shut off through the auto idle stop system. I pressed the auto idle stop off button because I wanted the engine running again before proceeding. Instead of restarting the engine, the vehicle completely shut down and became inoperable in traffic. I repeatedly attempted to restart the vehicle, but it remained unresponsive for approximately 20 seconds before it finally restarted. This created a serious safety hazard because I was unable to move the vehicle while positioned in active traffic. This was not normal auto idle stop operation, as the engine should have restarted when I pressed the button. This has happened several times already, where the car will not restart the engine. Requesting that NHTSA investigate possible auto-idle stop/failure-to-restart problems affecting the 2026 Honda Odyssey.

My ais system kicked in causing the engine to shut off. Unfortunately, the engine did not restart. I was unable to start my car or even shift it to neutral for a helpful bystander to help me push my car off of the road. I was blocking traffic on a busy road and I am very fortunate that I was not rear ended. Eventually, after about half an hour, was able to get the car restarted (even then, lots of “clicking” and hesitation with starting). I then drove the vehicle home. I took it to Honda and they made me aware today that they were unable to get the car to repeat this problem, nothing was wrong, I could pick it up and let them know if it happened again.

The idle stop function failed to restart the vehicle while in traffic at a red light. The vehicle was in traffic on a state highway and was unable to restart without shutting the vehicle off and on again. The problem has happened frequently the past few weeks to where I was able to reproduce and record the incident. The battery light appeared before shutting off the car with the push button on/off.

The auto idle system shuts off the vehicle completely at a stoplight or intersection and fails to restart when you release the brake. The vehicle is stuck in traffic and doesn’t restart for a few minutes mine had to be jumped started this third time it happened. This created a hazardous safety condition for my family in which kids are always traveling. The dealer has not provided solution. Concerned this can cause a fatality because I can get rear ended.

The vehicle suffered an auto idle stop failure at a red light. The engine shut down normally, but failed to automatically restart when the brake was released. There were no dashboard warning lights, and I was forced to manually shift the vehicle into park to restart the engine in active traffic.

Vehicle restarted itself at a traffic stop to.  vehicle stalled at another traffic stop.  both occurred on the same single day drive.

While stopped at a red light, the auto stop/start system shut off the engine as designed but then failed to restart it. The vehicle remained stalled in the intersection for several minutes while I attempted to restart the engine manually. This left the vehicle and my family stopped in traffic, creating a potential safety risk from surrounding vehicles. There were no warning lamps or messages prior to this incident or after.

Vehicle stalls at stop lights when the air conditioner is on when idle stop is engaged.

The vehicle experiences a sudden and complete engine stall while at a complete stop in traffic (such as a red light) due to a failure of the auto idle stop (ais) system. The engine shuts down smoothly as intended by the fuel-saving feature, but fails to restart when the brake pedal is released or the accelerator is pressed. The vehicle drops into a total shutdown state, requiring the driver to fully shift into park, switch the ignition completely off, and manually press the start button to restart the engine. No warning lights, error codes, or dashboard messages appear before, during, or after the failure. This creates a severe safety hazard by leaving the vehicle unexpectedly stranded and unresponsive in active intersections.

Georgia.

The idle restart function causes the van to shut off completely when at stop lights in heavy traffic. It does not immediately restart and we have to sit in traffic while folk are honking at us to go. It doesn’t do this every time, but has happened 3 times in the last 3 months.

Would die at lights and so on, starter replaced and its started doing it again. Dies at lughts, stalls out at stops then will hesitate to start again and will throw itself forward making a clunky noise.