2024 Honda Odyssey: start-stop system problems

Filed Oct 26, 2026 · Electrical, Engine · FL

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.

Filed Oct 19, 2026 · Electrical, Engine · AZ

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.

Filed Sep 24, 2026 · Electrical, Engine · FL

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.

Filed Aug 6, 2026 · Transmission · MI

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.

Filed Aug 1, 2026 · Electrical, Engine · GA

2024 odyssey engine shut off while in drive thru at restaurant. Unshure if auto start stop override was active. Either way the van had to be re started using the start button. Van re started on second or third attempt to re start with start button. This is a repeat occurance since having starter replaced in response to a similar problem about a year ago.

Filed Jul 31, 2026 · Electrical, Engine · TX

Car purchased July 4, 2024. Idle stop/start was working but after several months, it became defective. After driving for some time, idle stop/start wouldn't work properly and cut the engine off when idling. I would have to turn the car, open my door, and try to restart the car. It also occurs after parking, turning off the car and less than 10-15min attempt to restart. Most of the time, it'll start after 1 or 2 attempts. Except today 07/31/2026, I got home and parked. After 20min, I tried to start my car and after 10-15 attempts, it wouldn't start. After waiting 2 hours, the car finally started.

Filed Jul 9, 2026 · Transmission · OH

The vehicle failed to re-start after being engine had been at full operating temperature then was turned off for a short period of time. It has also struggled to re-start with auto start/stop leaving the vehicle partially in a busy intersection without any engine power until it successfully turned over several seconds after releasing the brake pedal. The dealer is unable to replicate. They have tested the starter and battery and confirmed both test good at ambient temperatures. No warning lamps. Once the vehicle cools, it is able to re-start again.

Filed Jul 2, 2026 · Electrical, Transmission · TX

The vehicle has an automatic stop/start feature that is enabled by default, though there is a button readily accessible to deactivate the function easily ea. time the vehicle is operated. The vehicle has just had the starter replaced under warranty @ 25K miles. There have been issues with the vehicle struggling to start for at least six months now - rough, slow starts where the engine is struggling to turn over. If I forget to turn off the auto-start/stop function, the engine will sometimes shut off at a red light - but it won't turn on again when the light turns green and it's time to move. I have had this happen a handful of times in traffic - the engine turns off and will not restart when normal procedures are followed.

Filed Jun 22, 2026 · Driver assistance, Electrical · GA

Had to replace starter at 29,000 miles due to auto stop/start prematurely wearing out component.

Filed Jun 3, 2026 · OR

After stopping at a red light behind a few cars in a left turn lane, the Auto Idle Stop (AIS) system turned off the engine. A moment later the light turned green and I let my foot up from the brake pedal. The engine failed to start. The hazard lights turned on automatically. I reapplied pressure to the brake and pressed the Engine Start/Stop button, which had no effect. Electrical systems remained active (i.e. the car did not turn off completely), but the engine also didn't start. I ensured the vehicle was in park and stepped out to verify the fuel door was closed (I had just filled the tank) and check the battery connections. Cars were going around us on the passenger side, and oncoming traffic was very close to me on the driver's side. I was concerned for myself and my passengers. No one was injured, nor was there a collision. After returning to the driver's seat, I tried the Engine Start/Stop button again. This time the car shut down. I waited a minute, then started the car. The engine started successfully. The vehicle is available for inspection. The problem has not been reproduced. We have been disabling AIS since the incident, so it's unlikely to happen again. The problem has not been confirmed by a dealer or service center, nor has it been inspected by anyone yet. I noticed the engine being slightly slower to restart after AIS stopped it in the few weeks leading up to the incident. There were no other symptoms I noticed.

Filed May 22, 2026 · Electrical, Engine · WA

Automatic start stop completely turns off car when pulling up to a stop sign, light, or yield intersection. Car completely turned off and wouldn’t start on a bridge overpass causing a safety hazard. Took a solid minute for it to restart.

Filed May 13, 2026 · Electrical · FL

Since purchasing my 2024 Odyssey EX-L I have experienced on multiple occasions where the idle stop engages but upon releasing the brake the vehicle fails to restart, dash lights up and vehicle is shifted automatically into park while sitting in traffic and vehicles moving all around me as well as honking as I am unable to restart the vehicle immediately. I have to push the start button multiple times before the vehicle will restart. Dealership is unable to replicate issue so I just started turning it off. Now the idle stop/start doesn't engage at all even after driving for hours. Additionally the vehicle is very slow to start especially if I have had to start the vehicle a different times throughout the day. I took the vehicle back to the dealer and they diagnosed it with a bad starter at only 38K miles which is of course out of warranty. Not only is this a safety issue of the vehicle stalling in traffic but Honda is failing to recognize a well known issue with the starter in this particular vehicle, sticking consumers with hefty repair bills for a manufacturing issue.