Engine And Engine Cooling Problems of Honda Passport - part 1

The contact owns a 2025 Honda Passport. The contact stated that while stopped at a stoplight, the contact attempted to accelerate; however, the start/stop system failed to restart the engine. The check engine warning light illuminated, and there was an alarm sounded. The message "shift to park" was displayed; but the gear shifter failed to shift into park. The brake pedal was depressed with excessive force and waited for a while before the vehicle was shifted into drive and the vehicle was driven forward. The vehicle was driven to the desired destination and shifted into park. The dealer was contacted and an appointment was scheduled. The failure mileage was 30,600.

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The contact owns a 2019 Honda Passport. The contact stated while driving the vehicle at an undisclosed speed, he noticed that the vehicle had reduced power and could not accelerate very well, accompanied by an odd noise coming from the engine bay. The contact stated that he had an independent mechanic confirm that the noise was a possible engine issue leading to the destruction of the camshaft and other components. The vehicle was taken to a dealer where they confirmed a main bearing connecting rod failure and a code stating a lack of oil in the engine, although the vehicle has shown a good history of maintenance. The contact stated he had gotten an emissions warning light illuminated on the instrument panel. The contact stated the issue he noticed was the odd sound, which first sounded like a ticking noise and became louder over time. The contact also noted the dealer had discovered metal shavings in the oil pan. The manufacturer was notified of the failure. The dealer confirmed the failure. The vehicle was not repaired.

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Failed engine rod bearing, and a full engine replacement is needed. As I was driving it completely lost acceleration power and became difficult to manage. The dealer verified the issue. All the warning lights including engine flashed on and off as the vehicle lost acceleration power.

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Vehicle information: 2025 Honda Passport (purchased in 2024, approximately 44,000 miles)safety defect summary:the vehicle experienced a sudden and dangerous failure to restart during an auto idle-stop event. While stopped at a traffic intersection, the auto idle-stop system engaged and shut off the engine normally. However, when I lifted my foot off the brake pedal to accelerate, the vehicle failed to restart, completely stalled, and left me stranded in live traffic. The dashboard displayed error messages, and the vehicle required a mechanical inspection confirming a premature starter motor failure. Safety risk & hazard:this defect presents an immediate safety hazard. The engine stalling unexpectedly in the middle of active traffic intersections leaves the driver, passengers, and surrounding motorists vulnerable to rear-end collisions. Power steering and braking performance are compromised while trying to get the stalled vehicle safely off the road. Context for investigation:this vehicle falls directly under the scope of the NHTSA’s active engineering analysis (ea25004) regarding Honda auto idle-stop restart failures. The premature failure of the starter motor at 44,000 miles is directly caused by the defective operational logic of the vehicle's automated stop-start system, matching the exact systemic defects documented in prior model years.

I have a 2025 Honda Passport with approximately 22,776 miles. Over the past several weeks, the vehicle has developed a progressively worsening starting problem that appears to be heat-related. After the vehicle is driven normally and reaches full operating temperature, then is shut off and allowed to sit for approximately 10 to 30 minutes, the engine will sometimes crank very slowly and sound as though the starter is laboring to turn the engine. The frequency and severity have increased over time. On two recent occasions, the engine barely turned over before starting. After the vehicle sits overnight and cools completely, it starts normally and cranks smoothly. A second related problem occurs when the auto idle stop/start system is active. Both my wife and I have experienced very slow restarts at stoplights. More recently, the engine failed to restart automatically after auto idle stop shut the engine off. I had to shift the vehicle into park and press the engine start/stop button multiple times before the engine finally turned over and restarted. This created a safety concern because the vehicle was temporarily unable to move while stopped in traffic. The vehicle was taken to an authorized Honda dealer for three full working days. The dealer reported that the battery, alternator, starter, charging system, and starting system all tested normal, and no diagnostic trouble codes were present. However, the dealer’s written repair description does not state that the vehicle was road-tested and then allowed to sit through the 10–30 minute hot-soak period that consistently produces the problem. The dealer stated that they allowed the vehicle to idle for an extended period and performed multiple starts, but this did not reproduce the conditions under which the problem occurs. I also opened a case with american Honda. Honda advised that they would not escalate the issue to engineering until the vehicle had been returned to the dealer one or two additional times. The probl.

This is related to service bulletin, 23–010 Honda will not fix my vehicle under the extended warranty unless the problem is replicated while they are doing a performance test.

The auto idle stop feature failed to restart the car after sitting at a stoplight twice this past week. The dealer (frank leta hoda) diagnosed the problem as a "bad starter". I believe this falls under the active investigation ea22005 - no start after auto start/stop engages. The vehicle is two years old with 40,378 miles at the time of reporting the problem to the dealer. I reported this to Honda corp and was assigned case number 16619534 which is being reviewed. The two incidents happened without warning during drives when I had already pushed the button to disengage the auto idle stop feature and was not expecting the engine to turn off at all.

On August 14th I brought the vehicle to coconut point Honda after having the vehicle stall with the auto stop feature. At that time, I also noticed that the car had trouble starting at times. After being there for four days, I was asked to come pick up the vehicle. Yesterday, on August 27th, the vehicle stalled again, this time at a busy intersection. This narrowly missed causing my wife to get hit at high speeds. The car shifted itself to neutral, the battery and warning light came on, and a message saying “shift into park” appeared on the dash. Despite several attempts, the car would not restart until it finally sat a moment and then powered back on. The car was brought back to coconut point Honda where I again voiced the complaint and safety concerns regarding the vehicle stalling out and shifting itself into park.

I purchased the 2023 Honda Passport used with 47,500ish miles. It came with a factory 60,000 5-year powertrain warranty. The only reason I paid cash for this vehicle. At 49,900 miles, the engine developed a subtle engine knock. At 50,460 miles, engine has clearly audible knock at idle - 2,000 rpm in gear (under load). 9/1/26 antrim Honda, [xxx] denied hearing obvious noise. They did not collect oil or oil filter but charged a $190. 00 diagnosis fee. The dealer’s conclusion: the noise is a “common engine characteristic of the 3. 5" but is contradicted by the presence of bearing material in the oil. With 1,000 remaining on the previous oil change, completed by keystone Ford, prior to my purchase, xxx, I changed the oil myself. I changed it into a new, cleaned pan, inspected and found heavy metallic “gold dust” bearing material suspended in the used oil. I have retained both the used oil and the oil filter for Honda’s inspection and independent laboratory analysis. No warning lights or codes on the dash. [xxx] [xxx] my work email if you can: [xxx] (work) [xxx] (personal) information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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Car began making loud rattling noise which proceeded to a larger grinding noise in the engine. Car sudden wouldn’t accelerate and had to be shut off. It wouldn’t restart and once it did get jumped produced an intensely loud grinding rattling noise. Car had to be towed to Honda which upon diagnosis was found to have metal shards in the oil pan and diagnosis to replace entire engine. Honda is denying recall on this engine though it is very similar engine to what they currently have recalled for their v6 engines in pilots, odysseys ect.

The vehicle experienced a sudden internal mechanical failure while driving, resulting in loss of propulsion and complete engine failure. The vehicle was towed to an authorized franchised dealership service center (gardena Honda) for inspection. No check engine lights, warning lights or any pile pressure warning! oil change was 2,500 miles until next service. Upon complete teardown and diagnostic inspection, factory-certified technicians confirmed internal engine damage, specifically connecting rod bearing failure leading to a seized engine requiring a complete engine replacement ($9,375. 00 total repair cost). This internal failure presents a severe safety hazard: an unexpected engine stall or lockup at highway speeds risks loss of power steering, loss of power brakes, and an immediate crash. Symptoms align directly with NHTSA recall 23v-751 and ongoing federal investigations regarding Honda 3. 5l v6 engine connecting rod bearing failures, where out-of-spec manufacturing leads to premature bearing wear and sudden engine seizure. The vehicle is maintained according to manufacturer specifications and has 55,649 miles. The failed components remain preserved at the dealership service department for federal or manufacturer inspection upon request.

Timing belt tensioner is failing on my 2023 Honda Passport. I have read this to be a common problem on many Honda Passports enough where a recall would be justified. If it fails the engine will completely implode causing the car to come to a complete stop even on the highway. The problem can be easily be confirmed to be a widespread issue through searching the internet for the same vehicle. Yes my vehicle may be inspected. No it has not been in any accidents.

Over the past two weeks we have been experiencing issues with the auto idle stop device on my 2025 Honda Passport. This has resulted in being temporarily stalled at several busy intersections. I have reported this issue to a Honda dealership where the issue was verified and it is scheduled for a starter replacement when the part is received from back order.

The vehicle engine is dying at intersections and going into “neutral” on its own when stopped. This has been ongoing for over a year, Honda denies any issues. It is becoming more of a safety problem more recently as the vehicle “downshifted” on its own while driving on the highway. (on that instance, the vehicle went from approx 45 mph to a slow crawl - just enough to pull off the road to safety).

The car in question is a 2026 Honda Passport trailsport elite that I purchased in August of 2026 -- and that I'm now thinking of selling! occasionally when accelerating from a stopped position the acceleration will hesitate for a full second, followed by a slight herky jerky motion. This presents a dangerous situation --- particularly when turning left with oncoming traffic barrelling down. This does not happen all the time but its scary and I end up just waiting to turn rather than risking getting t-boned. I notice on reddit and the Honda forum that this is a known issue! nobody has offered a reason. I feel like selling the car it's so bad.

There is a known issue with auto idle feature. If you do not manually turn off every time it stays on and occasionally will cause car issue when stopping. I have had it happen in vehicle about a dozen times. When you fully depress brake engine is suppose to I gel to save gas however on occasion the vehicle will completely stall out. I have had this issue happen when approaching stop signs or in traffic situations. The biggest problem is trying to reengage car. Sometimes you can feel it starting to do this and if you quickly apply gas you can avoid it however sometimes the car will lock up with display lights and you have to keep pushing the engine stop button to turn off the vehicle and turn vehicle back on. It is sometimes difficult to even turn off engine vehicle when this happens but seems to be only way to get vehicle to respond. I have had vehicles behind me almost hit me while I try to get vehicle out of this mode. I know it’s an issue as it’s all over the forums when you search for fix.

The car has failed to start on numerous occasions. The car has stalled due to the auto start/stop and the dealership told me that the battery needs to fail testing in order to replace under warranty. This is a major safety risk and the dealership said it’s a known issue but they can’t fix it. A recall needs to be put out immediately.

The engine experienced a catastrophic lower-end bearing failure at approximately 63,000 miles. The vehicle had been maintained according to the manufacturer's recommended maintenance schedule at the dealership service department. There were no missed oil changes. The failure occurred without any prior indication that a major internal engine problem was developing. The vehicle was taken to a Honda dealership, where the engine was disassembled. The dealer confirmed a lower-end bearing failure and reported significant metal debris inside the engine. The engine was determined to require complete replacement. A sudden internal engine failure creates the risk of an unexpected loss of power while driving, which can increase the risk of a crash, especially in traffic or at highway speeds. The failed engine is available for inspection through the servicing dealership if requested. The failure has been confirmed by the Honda dealership. No warning lamps or messages provided sufficient advance notice to prevent the failure beyond symptoms associated with the engine failure itself. I am submitting this report because I believe this may represent a manufacturing or design defect rather than normal wear and tear. I request that NHTSA investigate whether similar connecting rod bearing failures are occurring in other Honda Passport vehicles with this engine.

The starter motor on my 2022 Honda Passport failed, causing a complete 'no-restart' condition after entering auto idle-stop mode. The vehicle previously received the mandatory pgm-fi idle-stop software update under Honda service bulletin 23-008, proving that the software fix does not protect the hardware from failing. The dealership diagnosed a failed starter but stated that my 2022 model is excluded from the 10-year starter warranty extension under service bulletin 23-009, leaving me to pay out-of-pocket for a known defect. I am filing this to support the ongoing NHTSA engineering analysis regarding Honda auto idle-stop system failures, as the defect creates a dangerous stall risk at intersections.

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The vehicle struggles to start after sitting for around an hour. A new battery has been installed after only 3. 5 years and 75k miles. A new starter was installed after the same interval. Problems have not been fixed. Probably all stemming from the auto start stop system.

I have a 2025 Honda Passport. When the start stop shuts off car it will crank very slow or not start at all and have to wait a few minutes for started to cool. After I did some testing on my own then went to the dealer with an appointment, they confirmed this is a know problem with Honda. They did some testing and assured me that my starter is bad. No light or warnings until it would not restart at the stop light. The dealer pulled information off the cars computer and showed me a graph on how low the voltage goes below the threshold.

4th occurrence. Car fails to start. The instrument display reads: auto engine idle stop system problem. Electrical system including radio, a/c etc were working. (including the car alarm which begins honking the horn as soon as I open the door) repeated attempts to start the car failed to do anything except to annoy anyone within earshot as the horn kept honking! roadside assistance was not able to get the car started either so it was towed to the dealer. I've had the car into the Honda dealer for recalls but this problem has not been solved.

On July 11, 2026, while driving, the vehicle suddenly experienced multiple system failures. The dashboard illuminated with numerous warning lights, including a flashing check engine light, indicating multiple system malfunctions. The vehicle was towed to the dealer due to the severity of the issue. It is currently at the dealership for inspection and diagnosis. I have not yet received a diagnosis or confirmation of the failed component(s) from the dealer. No warning lights, messages, or symptoms appeared prior to the sudden failure. The abrupt illumination of multiple warning lights while driving created a significant safety concern regarding the reliability of critical vehicle systems.

For several months before the failure, the auto idle stop (engine stop-start) system became progressively slower to restart the engine after stopping. Each restart sounded sluggish, as though the starter was dragging, and the vehicle would remain stopped for several extra seconds before moving. This occurred repeatedly at traffic lights and other stops creating a safety concern as drivers behind me expected my vehicle to begin moving when traffic started. The unexpected delay increased the risk of being rear-ended or causing confusion in traffic. The failure eventually became complete. While stopped on a two-lane road waiting for another vehicle to turn left into a driveway, the engine shut off as expected with the auto idle stop system engaged but did not restart when I released the brake. Instead, the vehicle entered what appeared to be a neutral state and could not be driven. I was unable to restart the vehicle for several minutes, leaving it disabled in the travel lane while other vehicles had to drive around it. This created a safety hazard because the vehicle was stranded in an active roadway. The vehicle had not previously displayed any warning messages related to this condition. Looking back, the progressively slower and dragging engine restarts appear to have been warning signs before the complete failure to restart. The vehicle is scheduled for inspection the Honda dealership this week. The failed components should be available for inspection if requested.

The vehicles trouble screen on the dash summoned us to engine problems. Do not drive over 40 and notify your dealer immediately. We did so, Honda America sent a tow truck picked up the vehicle and sent it to the dealer. The next day the dealer contacted us and said they found excessive carbon on all the engine valves and all 6 cylinders were miss firing. The dealer gave us a loaner, after several phone conversations with the dealer and Honda America they gave us the vehicle back. They walnut blasted the valves to clean the carbon and Honda America is investigating the issue. This vehicle is a 2026 Passport with 24000 miles.

I drive the car with the engine-idle-at-stop function disengaged. Several times when slowing down, but still moving, the car shifts into park; the ac and radio remain on. I have to press engine start to start the engine. Several other times when already stopped, such as at a red light or in traffic, waiting to make a turn, the engine shuts off and the car shifts into park. I have to press the engine start button to turn the car back on. I am getting honked and hollered at in traffic, and could easily be vulnerable to being rear-ended when my moving car suddently turns off ad stops running (winds up in park). A non-dealer ran diagnostics and found no history of any error codes, and the system worked when they drove it. The day before the non-dealer had the car, it shut off 2 times in about 2 miles. He said the new battery is fine, the alternator is fine, and they do not know what to troubleshoot. No lights light up prior to the incidents, but they light up momentarily during it is the "charging system indicator" and the "malfunction indicator lamp" that light up. The new battery is one week old and installed as per the owner's manual and was checked by a 3rd party today. These events have occurred with both the original and new batteries. All of this has been over the past few months, with most incidents - an escalation - the past couple of weeks.

Got to red light, auto stop idled down car, when going to move car shut off and stalled out. Also happened two times in a drive thru. All times messages popped up auto stop interruption and vehicle in accessory mode.

Our 2026 Honda Passport tse suddenly stalled twice in active traffic intersections in albuquerque, nm under acceleration and during a left turn, causing a sudden loss of motive power and a severe safety hazard and a potentially life threatening situation. Telemetry logs from an aftermarket gps device installed in my vehicle captured a catastrophic voltage drop down to 10. 886v during the incident, which electrically blinded the ecu and prevented the vehicle from storing a diagnostic trouble code. The vehicle was taken to garcia Honda in albuquerque, nm who documented the symptoms ('loss of power on accel,' 'hesitates and jerks') but released the vehicle unfixed because no digital codes were present. The vehicle is currently grounded as unsafe to drive. American Honda corporate case number: [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

The idle-stop feature is malfunctioning, the vehicle is equipped with an "auto idle stop" feature that has a dangerous defect. The engine frequently fail to restart after shutting off at stops, unexpectedly leaving the driver stranded or immobile, with the risk of being hit from behind by incoming traffic.

25 Passport black edition only 27k miles at a stop my vehicle won’t start back up kicks it from d to n will start flashing to put in p. Vehicle will not start back up until I turn off and back on. The second time it did this it wouldn’t even start back up battery light flashing. I try to remember to turn that stop/start button off. Very dangerous. Went to dealership. Says they can’t do nothing unless warning are on at the time of check. 4/24 was the second time this has happened. When I start the Passport it’s like it has troubles and not wanting to start. Lights will start flashing braking system and blind spot all the safety feature lights. Something is wrong with these Passports.

The vehicle experienced a catastrophic internal engine failure caused by connecting rod bearing failure. Prior to the failure, the engine developed abnormal internal knocking/noise, indicating bearing deterioration. The engine is currently available for inspection. While traveling approximately 55 mph on [xxx], the check engine warning light illuminated. Within about one mile, the engine rapidly lost power and developed a severe knocking noise. The sudden loss of power at highway speed created a serious safety hazard by reducing my ability to maintain traffic speed and safely maneuver the vehicle. I had my child in the vehicle, and both we and surrounding motorists were placed at risk of a collision while I attempted to move to exit traffic. The failure has been confirmed by an independent repair facility, absolute automotive llc in parker, colorado. Their inspection determined the engine suffered internal damage due to connecting rod bearing failure. I have the engine replacement invoice, technician's diagnostic notes, and photographs documenting the engine damage. The vehicle has not been inspected by Honda. I contacted Honda to report the failure and request assistance, but I was informed there was no recall for the 2021 Honda Passport equipped with the 3. 5l v6 engine and that Honda would not provide assistance unless a recall existed. Before the engine failed completely, the engine developed abnormal internal knocking/noise. While driving on [xxx], the check engine warning light illuminated, and within approximately one mile the engine lost power and produced a heavy knocking noise, rendering the vehicle unsafe to operate. I am submitting this complaint because a sudden internal engine failure resulting in loss of power at highway speeds presents a significant safety hazard and should be investigated. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

04/10/2026 at around 8am and 04/14/2026 at around 7pm - at both times, car stopped at red light. Auto start-stop shut off car engine. When light turned green and stepped on gas, engine shut down and warning lights came on. Car was still in “drive. ” had to push “park” button and then started engine.

Description: the vehicle suffers from an intermittent and dangerous "no-restart" defect involving the auto-idle stop (ais) system. When the vehicle comes to a complete stop and the automated stop-start system shuts off the engine to conserve fuel, the engine frequently fails to automatically restart upon release of the brake pedal. This results in a sudden, unexpected loss of engine power and complete immobilization in live traffic or intersections. ?this exact failure mode is the subject of an active federal engineering analysis by the national highway traffic safety administration (NHTSA ea25004, covering ~2. 2 million Honda and Acura vehicles). Prior manufacturer service bulletins and part-replacement attempts have proven ineffective at permanently resolving the hazard, creating an ongoing and unacceptable collision risk.

My 2021 Honda Passport elite suffered cataphoric engine failure at 90,000 miles. The 6th cylinder bearing was missing when my vehicle was towed into Honda for diagnosis after my engine shut off while I was traveling 55 mph. I had no warnings for this failure including no engine noises and no check engine lights. I had to have a new engine put in my vehicle and Honda refused to cover the cost at 100% because they stated there were no open recalls at this time. I feel this is a manufacturer engine defect that is the same as the open recall defect Honda has on the 2017, 2018, and 2019 pilots with the same 3. 5-liter v6. The engine failure descriptions are exactly the same.

Car transmission issue not getting enough power while putting foot on gas pedal rpm goes upto 5k for getting speed not shifting gear properly.