2024 Honda Ridgeline: start-stop system problems

Filed Nov 1, 2026 · Electrical, Engine · MN

Vehicle purchased in June of 2024, and with auto start in normal state (not disabled) vehicle does not restart (as it is designed to) when stopped at a stop light. I will have to put the vehicle into a parked state and then attempt to restart it. Fortunately I have not been rear ended yet, but it has caused delays in traffic having to attempt to complete this to get the car running again. Does the 2012 EPA rules and "off-cycle" credits that encouraged automakers to adopt automatic start-stop systems to reduce emissions really help people from possibly getting hit at a stop light/stop sign. I know I can turn it off, but if I turn it off why does it turn on automatically when the engine shut off and is restarted again.

Filed Oct 29, 2026 · MA

Intermittently when I come to a stop, my vehicle does not restart from the auto start stop. When I mentioned this to the Honda dealer, they said my battery was bad and needed to be replaced. I replaced it in the problem still persists. I drive on route [XXX] from [XXX] to [XXX] daily for work and this has happened a couple times in rush-hour traffic. I’ve gotten a video of this and I have showed the dealership and they are not covering this under a powertrain warranty. My understanding there is an investigation, and Honda is aware of these issues. Investigation number is.EA25004. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 23, 2026 · Electrical, Engine · FL

Idle stop start, in traffic stopped, engine dies. Took a few minutes with traffic backed up behind me. Very dangerous..

Filed Oct 17, 2026 · Electrical, Engine · MD

In August 2026, my 2024 Honda Ridgeline Black Edition became undriveable while traveling in stop‑and‑go traffic on a four‑lane interstate. Without warning, the vehicle shut down completely and would not restart. After multiple attempts, it eventually restarted, but the shutdowns continued several more times during the same trip. The local Honda dealership retrieved diagnostic codes indicating software and transmission faults related to the auto stop/start system. They reinstalled the vehicle’s software. Several weeks later, similar failures occurred again involving the stop/start system. During the second evaluation, the dealership diagnosed the starter motor electrical connections as the source of the fault, noting that the starter was drawing excessive amperage. Replacement parts were no longer available from Honda and took several weeks to obtain. After replacement, the vehicle continues to experience electrical malfunctions, including unexpected computer reboots when coming to a stop. The issue remains unresolved, and the vehicle continues to pose a safety risk due to unpredictable shutdowns and electrical instability.

Filed Oct 15, 2026 · Engine · 40,000 miles · AL

The contact owns a 2024 Honda Ridgeline. The contact stated that while stopped at a red traffic light, the engine failed to restart after the Auto Start/Stop feature engaged. The battery warning light briefly illuminated on the instrument panel. The contact shifted the transmission to Park (P) and pressed the Engine Start/Stop button to restart the vehicle. The contact deactivated the Auto Idle Stop (AIS) feature to prevent the failure from recurring. The vehicle was taken to a dealer, where it was determined that the starter motor required replacement; however, the replacement part was on backorder. The contact associated the failure with the federal safety agency Action Number: EA25004 (Engine And Engine Cooling). The manufacturer was notified of the failure by phone, and a case was filed. The failure mileage was approximately 40,000.

Filed Oct 9, 2026 · Electrical, Engine · GA

Starter failed to start ridgeline while at stop light while auto start/stop was engaged. Safety issue as the car stopped in the middle of traffic

Filed Oct 3, 2026 · Electrical, Engine · MA

I was on 93 north in stop and go rush hour traffic just north of Boston Ma. Came to a stop and my auto start stop shut off as usual but the car didn’t restart. I had to shut the car off and restart it as if I just got in it. This is a huge concern seeing how I’m in this traffic daily and it’s not a safe place for your car not to restart.

Filed Sep 14, 2026 · Electrical · TX

2024 Honda Ridgeline, VIN [XXX], approximately 21,000 miles. The vehicle has repeatedly failed to restart in traffic after the Auto Idle Stop system automatically shut off the engine. Failures occurred XXX. During one occurrence, I was nearly rear-ended when the vehicle failed to restart as traffic began moving. The vehicle also intermittently cranks abnormally slowly when hot. The starter will crank, pause, then crank noticeably slower. I can intermittently reproduce the fail to start problem by driving until the vehicle is hot, shutting it off, and immediately restarting it. I have two videos of this condition. Honda replaced the battery, but the problem continues. The dealer reports that the battery, alternator, and starter pass diagnostic testing. I provided video documenting the abnormal slow cranking and failure to start, but no repair has been made. My primary safety concern is that Auto Idle Stop automatically shuts off the engine while stopped in active traffic, but the vehicle may then fail to restart, leaving it disabled in a traffic lane. The vehicle has already experienced this failure three times. the federal safety agency is currently investigating Auto Start/Stop no-restart complaints involving 2020–2025 Honda Ridgelines under EA25-004. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Dec 22, 2025 · Electrical · KY

Auto Start/Stop Malfunction. On two occasions the Auto start/stop has shut the engine off at a stop light and after releasing the brake the vehicle went completely dead. Dashboard/radio and all electronics dead. After multiple attempts the vehicle finally restarted. Now the normal start is sluggish like a low battery. Battery was replaced under warranty and check out multiple times by the dealership with them not able to find any issues.

Filed Mar 29, 2025 · Electrical, Engine · AZ

The automatic engine stop/start system is a safety hazard. On multiple occasions with two different drivers (husband and wife owners), the engine has stopped just as the accelerator is pressed after waiting for traffic to clear at a stop sign or while waiting to enter a street from a driveway or parking lot. The delay when expecting the vehicle to accelerate has nearly caused accident(s) several times. Drivers are forced to switch off the automatic stop/start system every time the vehicle is driven since it defaults to active and it is not safe to use. The system should be permanently disabled or at least programmed to be disabled as default when engine is started. This issue was reported to the local Honda dealer during the first routine service--owners were told that nothing could be done by the dealer. The service advisor suggested that we contact manufacturer or the federal safety agency directly. The incident date and mileage were entered below for yesterday since that was the latest event. It has happened numerous times since the vehicle was purchased in July 2024.