Honda Odyssey battery drain problems

Filed Nov 1, 2026 · Electrical, Engine · OK

The idle/stop function fails frequently at stop lights and stop signs. When it stops the engine it fails to restart and drains the battery. It began occurring very early on with the vehicle I’m guessing around 20,000 miles. I took it to the dealership while it was under warranty and they replaced the battery, and I believe the starter. It seemed to help for awhile but around 40,000 miles it started occurring again. I’ve been lucky to not be rear ended but drivers have had to go around me or sit through a stop light. There are no warning lights. I try to turn off the idle off button every time I start the vehicle. It is very unsafe and no longer under warranty. The dealership seemed like they didn’t know what was causing it last time and they had the van for over a week.

Filed Oct 18, 2026 · Electrical · NY

The driver sliding door would not close and would sometimes reverse direction. Eventually, it failed completely and would not close. Dealership repair involved the rear door latch and motors and cost over $2600. Two weeks later and the passenger sliding door is doing the same exact thing. This is clearly a safety issue as I cannot be sure the door will not open completely while driving. The computer receives "door open" signal even while the car is off which drains the battery. I will not spend another $2600. Over $5000 to maintain a vehicle less than 5 years old for something as simple as the use of plastic components in a door latch is ridiculous and should be covered by Honda for choosing to use inferior components.

Filed Oct 12, 2026 · Electrical, Engine · HI

My 2024 Honda Odyssey repeatedly failed to restart after the automatic idle stop system engaged at traffic lights. On numerous occasions, the engine shut off normally but would not restart when I attempted to resume driving. I had to shift into Park and manually restart the engine before continuing. This happened regularly and created a safety concern because I could become stranded in traffic with my children in the vehicle. I eventually began manually disabling the automatic idle stop feature every time I drove because I was afraid the vehicle would fail to restart. I reported the issue verbally to a Honda dealership employee during a previous service visit and was advised to disable the automatic idle stop feature rather than continue using it. In October 2026, at approximately 21,000 miles, the vehicle displayed a low battery warning. Several days later, it completely failed to start after stopping at a gas station. Three separate jump-start attempts were unsuccessful. The dashboard lights and audio system worked, but the power windows stopped functioning. An authorized Honda dealership diagnosed a completely failed starter. The service advisor stated that the starter failure had also drained the battery. Both components were replaced under the factory warranty. The dealership stated that these repairs should resolve the previous idle stop failures, but the underlying cause of the premature starter failure has not been explained, and I do not yet know whether the problem is fully resolved. I am concerned about the repeated failures to restart in traffic and the complete starter failure at only 21,000 miles. I would like this investigated as a potential vehicle safety defect. I do not know whether the dealership retained the failed components for inspection.

Filed Sep 15, 2026 · Electrical · PA

While the idle stop system was active, the vehicle turned off while stopped at a red light as expected. After the light turned green, the vehicle did not restart and turned all the way off and then attempted to reboot. I had to push the on button to turn the car back on. The first three attempts to start the vehicle resulted in clicking sounds like a dead battery. This has reoccurred at least 4 times in the past couple weeks and has only occurred while restarting with idle-stop and not when starting for the first time. I’m concerned I will get rear ended while I have my little kids if it doesn’t restart.

Filed Aug 17, 2026 · Engine, Fuel system · NY

While at a stop light on a major road, the vehicles auto start stop engaged. Upon the light turning green, I released the brake and vehicle failed to restart. The vehicle put itself into park and flashed a warning message "problem detected....." . I pressed the start button, and at first the vehicle failed to start, making a clicking sound, consistent with a dead battery or starter. I had to press the start button 4 times before the vehicle restarted and I could proceed. I was extremely concerned as I had my wife and three kids in the car, unable to move forward on a major roadway. I have an appointment at the dealer for this Friday.

Filed Jul 29, 2026 · Electrical · VA

Water has leaked into the driver side rear of the vehicle, causing corrosion and failure of the power tailgate control module. Water has also soaked the carpet and foam in the rear driver side. This power tailgate control module failure has caused a battery drain as the trunk opens on its own and does not respond to interior buttons or key fob buttons. The van battery has needed to be jump started twice so far as a result of this issue. Further investigation revealed some cracks in the body of the van over this area.

Filed Jul 19, 2026 · Electrical, Engine · CA

My minivan has had repeated electrical and safety-related failures since shortly after it was leased. The vehicle has died or failed to start five times, including multiple tow events. The first battery failure happened shortly after delivery, but we thought a light may have been left on and did not know to bring it in. The problem continued. The dealer has replaced the battery, recharged the battery, replaced the alternator, and later found an excessive parasitic draw, but the electrical problems have continued. The failures affect more than starting. The sliding doors have failed 30+ times by refusing to close and acting like something is blocking them when nothing is there. This creates a safety concern because passengers may not be able to safely enter, exit, or secure the vehicle. The instrument cluster has gone black on startup in Park about 10 times and has also blacked out or faulted while in use. A brake failure warning light appeared once. The backup camera intermittently dims so badly that I cannot see behind the vehicle while reversing. A service advisor observed this issue, but the technician could not reproduce it during inspection. The DVD/interior electronics, USB charging, and wireless phone charger have also failed. The power tailgate/trunk malfunctioned repeatedly before repair, including problems opening or closing and clicking. The front driver and passenger windows also do not roll down smoothly. The front window still shakes or drags even after two repair attempts. The vehicle has been inspected by authorized service centers and is available for inspection upon request. The exact root cause is unknown, but based on the repeated dead battery, charging, parasitic draw, door, display, camera, brake warning, interior electronics, and power window failures, the pattern appears consistent with an unresolved electrical or charging-system defect.

Filed Jul 8, 2026 · Electrical, Engine · MI

Stopped in heavy traffic in a four lane highway. Auto start/stop shut the engine down as expected. Traffic ahead cleared. I took my foot off of the brake to step on the gas. The engine didn't start up, and the radio and all lights inside went blank. Traffic behind me approached at about 45 mph. and were swerving around to avoid hitting my dead vehicle from the rear. I pushed the start button. Nothing. Again. Nothing. Several times more with my foot on the brake, or off the brake. Nothing. I put it in park and kept trying the start button. Finally it started, the radio and dash display came on, and from then on it operated as usual. Scared the hell out of us. There was no warning that anything in the car was malfunctioning before this happened. Took it to the dealer. They looked it over, kept it overnight. Told me the next day that the battery can get drained too much if the air/cond is on max and the start/stop feature doesn't like that. They used a machine to drain the battery and recharge it and they tell me now that it should be good. I don't believe one has to be aware not to use the air on max while the start/stop is enabled. I'm afraid to drive the car now! Our lives were in danger.

Filed Jul 7, 2026 · Driver assistance, Electrical · PA

After the vehicle is off, and after the smart key fob is removed from the vehicle, the dashboard will flicker, the alarm sometimes goes off and the headlights turn on draining the battery and leading to me having to jump the car to get it started. This makes the car undependable as it could happen after driving somewhere and leave myself or my wife stranded. I have taken this in to the Honda dealership but they noted that it did not occur when they were servicing the vehicle and they weren't sure what the issue could be. Many times the check engine light, FCW and LDW lights will come on and then reset after the car has been driven.

Filed Apr 23, 2026 · Electrical · CA

I am reporting a recurring and dangerous failure of the infotainment system and electrical control in my vehicle. The following issues occur intermittently but frequently: Safety Camera Failure: The center display screen often goes black, causing the backup camera and side-view cameras to fail completely. This occurs while the vehicle is in reverse, creating a significant blind-spot hazard and risk of collision. I specifically visited the dealership in early June 2025 to inquire about this issue—and I have video evidence to prove it—yet the electronic fault "magically disappeared" (an intermittent issue) when the vehicle was inspected on-site. Despite this, the dealership still charged me a $300 diagnostic fee. Total System Freeze: The GPS navigation, audio system, and all center console controls frequently stop responding or shut down entirely while driving, causing significant driver distraction. Power Management Defect: Most critically, the infotainment system and audio often fail to shut off even after the engine is turned off and the vehicle is locked. This parasitic draw continues until the 12V battery is completely drained, leaving the vehicle stranded and potentially creating an electrical fire hazard. On 03/20/2026, the infotainment system failed to shut down after the engine was turned off, which completely drained the battery. I had to call AAA for roadside assistance to tow/jump-start the vehicle to the dealership. I have a video recording of the system staying powered on while the vehicle was off. Furthermore, I just replaced the 12V battery with a brand new one in February 2026, confirming that this is a parasitic draw caused by a vehicle defect and not a faulty battery. I am unable to upload videos here, but I reserve the right to present them.