2021 Honda Odyssey engine problems

Related recalls

No recalls on file.

What owners say

1. Filed Sep 2, 2026ILElectrical SystemEngine

   Mileage: 121000 When stopped and the auto idle initiated, we have had numerous incidents where the van has shutoff and required a restart. More recently, when the auto idle initiates, the entire engine turns off and the van has no power(car won't restart, can't get the car into neutral, sliding doors and tailgate won't open). I would then need to jump start the car with my portable battery. This has occurred 4 times thus far. Honda dealership had recharged the battery but it…

   NHTSA complaint #11761544 · source
2. Filed Aug 26, 2026NMElectrical SystemEngine

   The first problem I came across was Auto start. It always say temporary off because either I didn't press on the break hard enough or the Ac is running. Mostly it off saying it need to be charge and the company already put a battery in the car and it still say the same thing. The other thing that keep happening with the car is the screen that pop up the back camera and also control the air conditioning.it shut off and mos network failed and trun off and it keep going off and…

   NHTSA complaint #11759833 · source
3. Filed Aug 14, 2026WIElectrical SystemEngineOther / Unknown

   When coming to a complete atop, the engine switches off (the idle stop function), which is ok, but when I release the brake the engine often fails to restart. I’ve replaced the battery but this appears to be a common problem. It’s been happening more now at the end of summer when it’s hot for some reason. I was told there is a similar investigation open: EA25004

   NHTSA complaint #11757074 · source
4. Filed Jul 22, 2026GAElectrical SystemEngine

   2021 Odyssey EXL shuts off completely at a traffic stop light. Happened 2 times in a 2 week period. Without warning the engine switches off completely and puts itself in "P" mode, all light comes on as if in accessory mode, radio switches off, all doors unlocked. To get going, the driver had to press brake pedal and start the car again (via Engine Start /Stop button). This issue started in my car at 93K miles. Never had any issue with mine before that. But it is scary…

   NHTSA complaint #11752152 · source
5. Filed Jul 14, 2026OHElectrical SystemEngine

   My 2021 Honda Odyssey Touring has experienced a severe engine stalling defect that creates an immediate traffic hazard. On multiple occasions during warm weather conditions, the Auto Idle-Stop system has engaged at a stoplight, but the vehicle completely failed to restart automatically when pressing the accelerator. Instead, the engine completely stalled out mid-drive, leaving the vehicle stranded in active traffic and requiring a manual cycle of the ignition button to turn…

   NHTSA complaint #11750213 · source
6. Filed Jun 30, 2026NCEngine

   Engine locked on the crank, not part of the recall apparently. Car had no lights come on. It Could have happened as I was driving just 5 minutes prior with 4 children in the car. It has 107,000 miles.

   NHTSA complaint #11747500 · source
7. Filed Jun 29, 2026TXElectrical SystemEngine

   When stopping at an intersection the engine fails to restart after stopping due to the auto start/stop feature. The car tries to start and stalls and dies, and must be completely turned off before it will restart. This has happened 5-6 times now. There are no warning lights on the dash.

   NHTSA complaint #11747208 · source
8. Filed Jun 15, 2026MNEngineOther / Unknown

   Stopped at a stoplight, the engine will just die. It won't start again by pressing the gas peddle. It will require a few moments to try to restart it. It is very stressful and dangerous when people are waiting behind you. This is not safe. It won't happen every time but the few and far between are not good. We have replaced the battery and it sounds like other people have had this problem but no recall has been made to fix it.

   NHTSA complaint #11744223 · source
9. Filed Jun 15, 2026ILEngineFuel, Hybrid & EV Propulsion

   Vehicle shuts off completely when stopping at a light or sign. It does restart but you don't know it until you need to go. It is a safety concern!

   NHTSA complaint #11744196 · source
10. Filed Jun 6, 2026PAElectrical SystemEngine

    What component or system failed or malfunctioned, and is it available for inspection upon request? The Auto Start/Stop function only works intermittently on our 2021 Honda Odyssey. Occasionally, when the Auto Start/Stop function does shut off the engine when the vehicle is at a complete stop, the engine fails to restart on its own. The vehicle is available for inspection upon request. How was your safety or the safety of others put at risk? This malfunction occurs…

    NHTSA complaint #11742470 · source
11. Filed Dec 16, 2025WIEngineFuel, Hybrid & EV Propulsion

    After driving for 2 hrs in single digit temperatures I entered the on ramp to interstate freeway. I lost power, couldn’t accelerate further and the Check engine light was flashing. I pulled over on the 4 lane interstate, turned off my car and restarted. CEL went away. This is the 2nd time in 2 Winters this has occurred during cold weather. Both on exit/entrance ramps when trying to accelerate after turning with traffic behind me. This can only be reproduced in specific…

    NHTSA complaint #11705252 · source
12. Filed Sep 9, 2025KYEngineOther / Unknown

    When attempting to restart from the autostop function (i.e. the fuel economy function), the vehicle fails to restart successfully. This has happened on multiple occasions. It is not a battery problem and I have had the battery tested and even replaced (by Honda) and the problem has continued. The vehicle will stutter, stall or even completely shut down. This has happened when I have been at intersections and on busier roads or even in traffic on the highway. Its very…

    NHTSA complaint #11686132 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology