Honda Odyssey won't start problems

Filed Nov 5, 2026 · Electrical, Engine · LA

We've experienced several occasions where the vehicle will not start. The vehicle typically starts just fine (first start on a trip), is typically driven, stopped for a short time (quick shopping run), and will not start upon trying to leave. The vehicle has left my wife stranded at least three times. In the life of the vehicle (so far), we have replaced the battery once (tested bad at the time). The current battery and original alternator continue to test good; we currently suspect that the original starter may be part of the issue.

Filed Nov 5, 2026 · Engine · CA

The 2025 Honda Odyssey I purchased has issues where the car will not start after the "Automatic Start/Stop" feature turns on. What that looks like is when I stopped on the freeway in rush hour traffic, or at a long traffic signal (usually with many, many people behind me on a busy road), my car will stall and not turn on. I have to wait, sometimes minutes, for my car to restart. This is a safety issue because it will stall / I will have to restart at very inappropriate times, like in rush hour traffic on the freeway. It has happened multiple times. No warning lights or messages came on, other than when the car had officially stalled. By that point, there is nothing I can do besides wait for a minute or so and restart car.

Filed Oct 30, 2026 · SC

Auto Idle-Stop (AIS) system: the engine shutting off and failing to restart. Happens constantly at intersections etc making it unsafe for me and my children. Someone could potentially crash into me etc as it takes longer for me to turn the car on, put it back in drive, and restart the engine. I have an appt at the dealer. Theres no warning, message or problems on the dash. It just shuts off. I also occasionally have a problem with my remote start, the engine wont turn over.

Filed Oct 28, 2026 · Engine · NY

sometime when the engine auto stops it doesn't start again

Filed Oct 25, 2026 · Engine · NY

When the car is shutting by every red light and you start driving again, the engine will not start. The car will shut off completely.

Filed Oct 24, 2026 · Electrical, Engine · IN

When idle start activates at a stoplight sometimes the car will not start when you take your foot off the brake. Car then takes several tries but it will start again. This is a dangerous situation and can lead to accidents. Only seems to happen randomly after the car warms up. Dealer did replace the battery but it did not fix the problem. My guess is the starter does not perform correctly after heat soak in the engine bay.

Filed Oct 23, 2026 · Engine · FL

Vehicle Information:Year/Make/Model: 2015 Honda Odyssey EX-L VIN: [XXX] Mileage: Approximately 45, 200 miles Component / Defect: Engine Oil Leak leading to Alternator Failure (Front Spool Valve / Valve Cover Gasket Leak onto Alternator) Summary of Incident and Service History: My car overheated and would not start on several occasions over the last year and a half starting in July 2025, leaving me stranded and requiring it to be towed. My car has been in service at the dealer multiple times for approximately 2 weeks each time. Oil Leak and Alternator Hazard: The vehicle experienced engine oil leaking directly onto/into the alternator. According to communications from Honda service personnel ([XXX]), oil leaking from the front spool valve and valve cover gaskets penetrates the alternator, causing component failure. The dealership explicitly warned that failure to complete these repairs would result in repeated alternator failure. XXX Service: The vehicle was brought in for diagnostic work and repairs at Brickell Honda Performed services included diagnostic procedures, engine oil & filter replacement, radiator fan motor replacement, A/C condenser fan motor replacement, and tire rotation. Total Paid: $2,443.60 Additional Repair Estimates Provided: Valve cover gaskets & spark plug replacement: $1,901.18 plus tax Front spool valve replacement: $1,641.70 plus tax Prior Related Invoices: An earlier invoice was issued on XXX for $2,096.29 by Brickell Honda for alternator replacement and other maintenance services. Safety Risk Statement: An unaddressed oil leak dripping onto the alternator poses a serious electrical component failure hazard while operating the vehicle. Sudden loss of electrical power while driving can cause engine stalling, loss of power steering, loss of headlights/lighting, and disablement in traffic, presenting a significant risk of collision and vehicle safety hazard. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 19, 2026 · Electrical, Seat belts · MI

Unknown. **Vehicle:** 2025 Honda Odyssey Touring **Component:** Engine / Electrical System / Automatic Idle Stop My 2025 Honda Odyssey Touring has repeatedly failed to restart after the automatic idle-stop system shuts off the engine while stopped in traffic. This problem began very early in the vehicle's life, at approximately 10,000 miles, and has occurred an estimated 8–10 times. The vehicle currently has 40,340 miles. When the problem occurs, the engine does not crank or make any clicking sounds. Multiple attempts are required before the engine will restart. On at least one occasion, the dashboard displayed the message "Press Brake and Push Start." I cannot confirm whether this message appeared during the other incidents because I was focused on getting the vehicle restarted and moving out of traffic. The problem has occurred exclusively following activation of the automatic idle-stop system. The vehicle starts normally when initially started after being parked. This presents a serious safety concern because the vehicle becomes unexpectedly immobilized at traffic lights or intersections, potentially exposing occupants to rear-end collisions or other traffic hazards. Honda issued a dealer communication dated May 21, 2025 (the federal safety agency document MC-11019246-0001), specifically concerning 2023–2025 Honda Odysseys failing to restart following automatic idle-stop operation. I am requesting that the federal safety agency investigate this recurring safety defect.

Filed Oct 18, 2026 · Electrical · CA

My 2023 Honda Odyssey (approximately 38,000 miles) has an intermittent no-crank/no-start condition. Pressing the push-button start produces no crank at all; the engine only starts on exactly the fourth press, consistently. The battery was tested and is good. The condition worsened noticeably after a high-pressure car wash, suggesting moisture intrusion. This matches Honda Technical Service Bulletin 23-023 ("Engine Does Not Crank"), which covers 2018–2023 Odysseys and attributes the defect to water entering the starter motor. The vehicle is about 2,000 miles past the 36,000-mile bumper-to-bumper warranty. I am concerned the condition will degrade without warning and leave my family — including small children — stranded. The vehicle is scheduled for diagnosis at Tracy Honda in [XXX] on XXX. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 12, 2026 · Engine · GA

The auto idle stop is causing the van to not start up after stopping at red light or stop sign and it causes the van to completely go dead in middle of the road. You have to turn the van completely off, while people behind you are honking their horns at you, and then crank the van back up in order to get it to go again. All dash lights are on but the engine dies and will not start without having to shut the van off. This is very dangerous and frustrating for any vehicle to do this, but especially a 2025!!!! This happened today 10/12/2026 but has happened several times already with my family.