2025 Honda Odyssey

On June 3, 2022, the Office of Defects Investigation (ODI) opened Preliminary Evaluation PE22005 after the agency received VOQs and several field reports concerning the Auto Idle Stop (AIS) feature on 2016-2019MY Honda Pilot vehicles. The complaints allege that the engine fails to restart on its own from a complete stop at a traffic light or road intersection with the AIS function engaged. The subject vehicles are equipped with a 3.5L engine with a 9-speed automatic transmission. On January 6, 2023, Honda released service bulletins 23-008 and 23-009. These service bulletins address the failure to restart issue in the 2016-2019MY Honda Pilot vehicles, as well as the 2015-2020 Acura TLX, 2016-2020 Acura MDX, 2019-2022 Honda Passport, and 2020-2023 Honda Ridgeline vehicles. The repair outlined in the service bulletins is a two-stage countermeasure to remedy the issue. The first stage is a Programmed Fuel Injection (“PGM-FI”) software update. The second stage is only deployed if the software update fails to remedy the issue. The second stage, depending on the model and model year, consists of replacement of the starter assembly, starter relays, and a valve adjustment. Additionally, Honda extended the warranty coverage to 10 years with unlimited mileage for vehicles requiring the second stage component replacement. ODI continues to receive complaints of the AIS failure to restart, with many complainants alleging the campaign countermeasures had been completed.NHTSA has reviewed Honda's Information Request Letter responses involving warranty claims, lawsuits, and consumer complaints in addition to ODI's own data. This Engineering Analysis is being opened to further consider the potential safety defect, including gathering additional data regarding Honda’s service campaign efficacy. ODI is additionally expanding the scope to encompass all vehicles addressed in Honda’s service bulletins 23-008 and 23-009 as well as newer model year vehicles, which are substantially similar to the vehicles covered by the service campaign. To review the ODI reports cited in the Opening Resume ODI Report Identification Number document, go to NHTSA.gov.

The issue is that auto-idle intermittently does not restart. There have been multiple instances when the car has failed to restart after auto-idle, and most recently, this happened in the middle of the day on a very busy road at a red light. Stopped at the red light, the auto-idle turned the car off and it did not restart. I had to sit with the vehicle until I was able to get it restarted, which took about 4 minutes. Being on such a busy road, it caused a traffic backup with other vehicles having to move from behind me, causing others to swerve into other lanes and also drivers approaching to slam on brakes. As for warning light-there are none until the car stalls, and then every warning lights seems to come on. At that point, the warning lights are useless as the issue has already occurred without warning, causing an immediate safety risk to me, as well as drivers around me. We took the car to the dealer, which said they have had to repair multiple vehicles of the same make and model for this very issue. We had to pay for the full repair, as the car is recently out of the warranty coverage.

NHTSA ID

11766592

Incident

Sep 20, 2026

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.

NHTSA ID

11766569

Incident

Sep 22, 2026

2025 Honda Odyssey experienced an Auto Idle Stop no-restart condition. While stopped at a traffic light, the Auto Idle Stop system shut the engine off, but the engine failed to restart when attempting to proceed. The vehicle was disabled at an intersection, creating a potential safety hazard.

NHTSA ID

11766426

Incident

Sep 14, 2026

Auto stop start sometimes doesn't work even though battery was just replaced. Sitting at stoplight and when the car turns off with auto stop it does not turn on automatically when trying to move the car. Have to cycle the ignition and sometimes does not start.

NHTSA ID

11766363

Incident

Sep 14, 2026

Problem with the idle auto off feature failing in traffic. Will be driving fine, come up to a stop (at a stoplight, stop sign, etc) and the engine will shut off as intended with auto off, but engine will then fail to restart/stall. Have to push the start button on/off several times before the engine will restart and we can continue driving, the delay leads to safety concerns and possibility of an accident with traffic behind us accelerating expecting our vehicle to be moving or other drivers not being able to predict our actions due to erratic start/stop. There is no option to permanently disable the auto start/stop. No warning or maintenance lights indicating there's a problem. This issue has happened 5-10 times since we purchased the vehicle late 2024. We have not taken the vehicle in to the dealer yet.

NHTSA ID

11766097

Incident

Sep 22, 2026

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.

NHTSA ID

11765662

Incident

Sep 19, 2026

We have had several incidences occur with the auto idle stop system. It has failed to restart at stop lights/signs, car turns off and you must restart it. It happens unexpectedly without warning and you do not realize it until you press on the gas pedal. It causes panic and anxiety due to traffic behind you. It has also occurred in parking lots and in our driveway. One incident occurred on a trip, driving for a long distance and then pulling off the road to stop, the car turned off and took several tries to restart it. We thought we were going to have call a tow truck. Luckily we were off the road and it did finally restart. Scary rest of the long drive home. We have not noticed any warning lamps, messages or other symptoms prior to failure. We are extremely worried we will cause an accident if we leave the auto idle stop system on. We try to remember to always turn it off. This has been happening since we bought the car brand new. The auto dealership has checked it and cannot find a problem and are of no help. We noticed a forum on the internet where there is an ongoing investigation into the problem. Hopefully, something will be remedied to be able to fix it. Until then we have to remember to press the system off button.

NHTSA ID

11765649

Incident

Nov 1, 2024

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

NHTSA ID

11765626

Incident

Sep 18, 2026

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2027 Odysseys with a customer complaint of the rear sliding door latch being stuck, causing the door to remain open or closed. To better understand the cause of this condition, AHM would like to collect certain parts from the vehicle prior to attempting a repair of any kind besides diagnosing the issue to corrosion and/or dirt buildup on the latch.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2026 Odysseys & Ridgelines and 2024-2025 Passports with a customer complaint of the Malfunction Indicator Light (MIL) on with the DTC P0441 (EVAP System Purge Flow Malfunction) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2026 Odysseys & Ridgelines and 2024-2025 Passports with a customer complaint of the Malfunction Indicator Light (MIL) on with the DTC P0441 (EVAP System Purge Flow Malfunction) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2026 Odysseys & Ridgelines and 2024-2025 Passports with a customer complaint of the Malfunction Indicator Light (MIL) on with the DTC P0441 (EVAP System Purge Flow Malfunction) stored. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.

Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2023-2025 Accords, 2022-2025 Civics & Odysseys with a customer complaint of a detached or loose rearview mirror bracket/slug from the windshield. Failure between the mount spring and bracket will not be accepted. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.

Over the Air System Update - This update contains the following performance enhancement: Resolves Navigation app freezing or black screen due to phonebook memory being full.