2026 Honda Odyssey: start-stop system problems

Filed Oct 22, 2026 · Electrical, Engine · NY

the van turns completely off very often when at a complete stop. i am not referring to the auto start/stop feature which is equipped standard on the vehicle. the van physically turns completely off, as if i turned off the car, requiring me to turn the car on completely. this has created very dangerous situations as im often traveling trying to merge into traffic etc and the vehicle is off on active roadways. there is no warning, just turns off completely

Filed Oct 22, 2026 · Electrical, Engine · NY

Our 2026 Honda Odyssey EX-L repeatedly shuts off completely while stopped at a traffic light or intersection and does not restart on its own. This is not normal Auto Idle Stop operation. When the brake is released, the engine fails to restart; the vehicle must be manually restarted by pushing the ENGINE START/STOP button. This happened four times in the week of October 19, 2026 alone, in addition to earlier occurrences. Each time the vehicle is left stranded in live traffic in an active intersection, blocking traffic and creating a risk of a rear-end collision. No crash, fire, or injury to date. Approximate mileage 8,000. This appears to be the same Auto Idle Stop failure-to-restart condition under the federal safety agency Engineering Analysis EA25-004, but that investigation covers only 2018-2025 Odyssey -- this vehicle is a 2026, outside its scope. The vehicle is under factory warranty. We request that the investigation be expanded to include the 2026 model year.

Filed Oct 3, 2026 · Electrical · SC

Auto start/stop is not working properly. Traffic had came to a hault on an exit ramp which caused the auto stop to activate. Once traffic started moving, foot was taken off the brake and gas pedal was pressed. Van would not go. Confused on what was happening, panic mode was setting in. Other cars were blowing their horns. We felt stuck. Husband looked down and realized it had went into P (park) mode on its own. So, he pressed the brake and tried to put it in drive but it would not switch over. So, he had to turn it off completely and restart it. It has done this 2 other times. Probably would be even more often if I didn't turn the auto start/stop off. We had less than 12000 miles on our van at the time of last incident. We have made an appointment with the dealership which admitted that they have had a lot of complaints regarding this same issue. I love everything about this vehicle except for the number 1 thing I should love, safety. I do not feel safe at all times in this vehicle.

Filed Sep 3, 2026 · Engine · GA

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.

Filed Jul 16, 2026 · TX

Intermittent Auto Start/Stop failure: When stopped at a red light or stop sign, the car sometimes completely dies. Fails to restart: Releasing the brake pedal does not automatically restart the engine. Manual restart required: I have to manually restart the vehicle and shift back into Drive to proceed. Traffic concern: This process takes 10 to 15 seconds, holding up the traffic behind me.

Filed Jun 9, 2026 · Electrical, Engine · MN

My 2026 Honda Odyssey was stopped at a traffic light with Auto Idle Stop engaged. When traffic was ready to move, the engine appeared to restart for about half a second and then shut down. The vehicle then shifted itself into Park and would not resume normal operation. The battery warning light was illuminated. Pressing the engine Start/Stop button caused all of the screens/displays to turn off briefly, but they came back on in the same failed state. The vehicle was disabled in traffic at an intersection. The component or system that failed appears to be the Auto Idle Stop / engine restart system, possibly involving the starter, starter relay, battery/charging system, or engine control software. The vehicle is available for inspection upon request. My safety and the safety of others were put at risk because the vehicle unexpectedly failed to restart and became disabled while stopped at a traffic light, creating a traffic obstruction and risk of being struck from behind or causing other drivers to maneuver around the vehicle. The problem has not yet been reproduced or confirmed by a dealer or independent service center. UNKNOWN whether diagnostic trouble codes were stored. The vehicle/component has not yet been inspected by the manufacturer, police, insurance representatives, or others. There were no warning lamps, messages, or symptoms prior to the failure that I noticed. The battery warning light appeared after the engine shut down and the vehicle would not restart normally.