Vehicle Speed Control Problems of Honda Accord - part 1

Problem summary: while using the vehicle’s traffic assist / adaptive cruise control (system that controls acceleration and braking in traffic), the vehicle unexpectedly accelerated toward a vehicle directly ahead as if no lead vehicle was present. This created an imminent rear-end collision risk. The issue occurred twice in the same drive. Incident details: on 18 Dec 2025 at about 5-15mph/ “stop-and-go traffic”], I was driving with traffic assist / adaptive cruise control enabled, which normally manages throttle and braking in traffic. I was following a semi tractor (no trailer attached). The semi was approximately 15–20 feet in front of me. While the system was engaged and operating normally moments before, the vehicle accelerated forward as if the lane was clear, despite the semi being directly ahead. I had to apply the brakes manually to prevent a collision. A short time later in the same traffic situation, the vehicle did it again—it accelerated toward the same type of lead vehicle and I again had to brake to avoid rear-ending it. During the second event, I observed the instrument cluster / driver display showing the lead semi incorrectly identified as a passenger car instead of a truck, and the display showed that “car” accelerating away, which was inaccurate and did not match real conditions. This suggests the system may have misclassified or failed to track the lead vehicle, leading to unintended acceleration.

My fiance has a 2018 Honda Accord sport touring, this past Sunday he was giving me a ride and about 5 min of driving , after stopping for a red light , the light turned green he pushed the pedal and the car starting moving then all of a sudden warning lights were flashing , the engine light , remote not in car, oil light, air bag , low tire, etc. There was alot at the same time when the warning lights came on as he pushed the gas pedal the car stopped accelerating, and he said he had no power in the pedal ,there was heavy traffic, a car could of rear ended us but he was able to put his hazards on and coast around the corner before the car stopped. He shut the car off and back on and it drove like normal again. I was scared of course and just wanted to go home. When we got home he remembered he still had his fathers obd scanner tool so he plugged it in the car and it showed no error codes. So that was really strange. He went to the store down the street the next day, but other then that he drives his work van and I have my own car. I was reading newsbreak and seen that Honda recalled only hybrid and newer years and thought thats odd I should let someone know this happen to his 2018 Accord , because im sure it has to happen to others. We didnt take it in or call the police , but this clearly could of caused a crash had he not remained calm and put his flashers, everything happened so fast. Im sure he would let you inspect it, he works during the morning. I have no clue why it did that and neither does he. Thank you for your time.

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While driving, my 2023 Honda Accord hybrid suddenly experienced a multi-system failure affecting: road departure mitigation system tire pressure monitoring system (tpms) vehicle stability assist (vsa) hill start assist electric power steering system brake system (“brake performance may be reduced”) all warnings appeared within seconds. The vehicle is available for inspection, and the incident is documented with multiple photographs. In addition to the system failures, the vehicle unexpectedly began to lose power while I was driving, causing it to slow down rapidly in active traffic. This created an extremely hazardous situation, including: risk of being rear-ended since my vehicle slowed without warning reduced steering assist reduced braking performance loss of stability control inability to accelerate out of the way this combination could easily have caused a serious collision. I later learned that there is an active recall related to the systems that failed on my vehicle. However: I never received any communication from Honda, no letter, no email, no notice of any kind. I am extremely unhappy and frustrated about this. Had Honda informed me of the recall: I would have scheduled service immediately I would not have driven the car under normal conditions I would not have been exposed to this dangerous situation on the road the absence of recall notification directly contributed to my being put in a potentially life-threatening situation. A recall notification exists for a reason which is to prevent exactly the type of failure and danger that I experienced. Honda’s failure to notify me removed my ability to take preventative action. The issue has not yet been diagnosed or confirmed by a Honda dealer. I will be taking the vehicle in for inspection as soon as possible. No inspections have been conducted yet, but I have full photographic documentation from the moment the incident occurred. No prior warning lights, symptoms, or error messages occurred.

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While engaging adaptive cruise control on highway speed, all the sudden I lost the sight of the car in front of me on the display, almost causing a collision, I also lost the correct waze display. After I stopped the car, shut off engine, then restart the car, re-engaging adaptive cruise control, both problems disappeared. This is an intermittent problem, it should be ASAP investigated then recalled due to huge safety concern !.

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On 11/3/25 Honda conducted the fuel injection recall fix. Prior to this, no warning lights were displayed on dash. 11/11/25 nine different warnings displayed on dashboard board. 11/13/25 at approximately 35mph the vehicle would not accelerate and the 9 warning notifications continued to flash. Cars had to go around me as I tried to find a safe place to pull to side of the road. I turned off the ignition. I took the vehivle back to the Honda dealership maintenance. My vehicle will be there till tomorrow. I was informed code p0304 was present. Prior to recall fix drivability was not a concern and and had no warning lights.

The head gasket leaked and a piston warped. The symptom was feeling a piston misfire and then the car wouldn't go over 10 miles per hour. Our safety was compromised because we were on a busy (45mph) road and couldn't turn off quickly nor go fast to keep up with traffic. The problem has been reproduced at an independent service center. The vehicle has only been inspected by the mechanic. The previous week all the electrical systems reported a failure. That was repaired by replacing some hose that collapsed on itself. During the misfire, the check engine light flashed, but it didn't before or after (when we were driving very slowly).

My vehicle is losing power while traveling on the road. All of the system lights are flashing and the gas mileage is ridiculous. It sputters uncontrollably and just stalls out and drops speed really quick. I’m really concerned for my well being. I’ve spent so much money trying to fix these issues and I don’t think it’s fair to me or any other Honda owner to have to be held responsible for something that is clearly a manufacturing issue. Although there was not a crash during this incident, it’s very dangerous and I’m terrified to drive my car but I have no other transportation right now.

While pulling into a parking spot my car unexpectedly accelerated. Brakes were unresponsive even after placing both feet on the brake pedal. Vehicle stopped only after I hit a tree. Engine continued to rev at which point I placed the vehicle in park and shut off the engine. Although the impact of the crash was severe my 1airbag did not deploy.

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The issue involves the adaptive cruise control and automatic emergency braking systems. When engaged, the system intermittently and unexpectedly applies full braking force while I am changing lanes on the freeway, even when no vehicle is directly in front of my car. This has occurred multiple times at highway speeds, causing the car to slam on the brakes abruptly, which poses a serious safety risk particularly when other vehicles are following closely behind. The issue most commonly happens when the adaptive cruise control is active, but it has also occurred occasionally when the system is not engaged. There are no consistent warning messages or error indicators before the event, aside from the brief flashing of the emergency brake light at the moment of braking. The problem has not yet been inspected or confirmed by a dealer, manufacturer, or independent service center.

I hereby state that my 2021 Honda Accord has experienced major mechanical failures involving the transmission and head gasket. The vehicle began exhibiting mechanical issues including rough shifting, loss of power, and engine overheating. Upon inspection by a qualified automotive technician, it was determined that both the transmission and head gasket have failed prematurely. These failures have rendered the vehicle unsafe and inoperable, resulting in significant repair costs, loss of use, and financial hardship. The nature and timing of these failures suggest a possible manufacturing or design defect. This statement is submitted in support of a formal claim and potential legal action against the responsible parties for the defective condition of the vehicle.

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I was slowing down to pull into a parking spot at my office and suddenly the car accelerated, jumped the concrete barrier and crashed into the brick wall. The car continued to actively crash into the wall, so I put it in reverse and it accelerated backward with such force that it crashed into the rear of the car on the other side of the parking lot and then spun around 180 degrees and crashed into the side of that same car. My car was terrifyingly out of control. There was a woman in another car who had just parked and luckily she remained in her car because if she'd gotten out my car could have hit her. I don't know if this is related, but I regularly used the brake hold function and pressed the button to turn it off as I was parking. My perception is that the car suddenly accelerated when I depressed the brake hold button to turn it off. I have the parking lot security camera footage that clearly shows I was braking when the car suddenly accelerated and went out of control. I had 3 hard collisions and the airbag didn't deploy. Luckily I only had some neck and back pain and wasn't seriously injured. My car and the other car were totaled. I'm incredibly disappointed that Honda didn't call me back in time to be able to inspect the car. The insurance company pressured me to settle and turn over title. I'm very angry that the insurance company says I'm at fault because I need to stay in control of my vehicle at all times, but how could I have done that when the car suddenly went out of control? now I'm going to have to pay higher insurance rates for something that I couldn't control.

All lights have popped up on dash. Stayed on for 2 days back in July and then went off. Came back on 2 days ago (oct 5th) and have not went off yet. Lka, cruise control, parking brake light, tpms, traction control, and engine light.

See all problems of the 2020 Honda Accord 🔎.

In the past 2 months my car starting having rough idle issues. As recommended by the dealership, I replaced the head gasket as they said it was leaking coolant into the cylinder causing the rough idle. Almost immediately after paying for this, the dashboard lit up like a christmas tree with multiple warnings and the car went into limp mode, lost acceleration and would have been extremely dangerous had we been on the interstate or multi lane road. Took it back to the dealership, ran another diagnostic and determined the fuel injectors needed to be replaced. These repairs cost over $5,000. Recalls have already been put in place for models around this one and Honda should acknowledge these problems as it is wide spread.

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On Tuesday, September 23, I was applying the brakes as I was approaching a stop sign. When I had slowed to about fifteen miles an hour the car suddenly accelerated and the brakes were not enough to stop it so I shifted into neutral and stopped. The engine continued to race in neutral. I shifted into drive and things returned to normal. I then started to move forward and the car suddenly again accelerated rapidly. I shifted into neutral and then into drive and things returned to normal. I then drove home without a further problem.

See all problems of the 2011 Honda Accord 🔎.

When traveling on an interstate highway in the left lane of a 2-lane highway with the adaptive cruise control turned on. Passing a tractor trailer going slower in the right lane, the car will apply the brakes unexpectedly. The dash will briefly show a "ghost" truck crossing into the left lane. The unexpected braking causes any vehicle behind the Accord to brake. Putting those vehicles and any behind them at risk. Smart Honda of des moines looked at the car on sept. 22, 2025 reported no error codes and nothing could be done. If the Accord hugs the far left shoulder, no "ghost" breaking occurs. If the adaptive cruise control is turn off and regular cruise control is turned on, no "ghost" braking occurs.

I have taken my car to the Honda dealership on multiple occasions because my car has stopped accelerating while driving on the interstate. The car will flash the check engine light and completely stop accelerating while driving. I was first told it was the fuel pump that was recalled and waiting over a year on the recalled part and multiple times breaking down while driving they finally replaced the part. After the dealership replaced fuel pump I continued to have problems unfortunately happening more often and worse than before replacing the fuel pump. I was then told my car was misfiring and needing a tune up which would involve replacing all four coil packs and spark plugs. I replaced all of these recommended parts with no resolution to my problem. I have since be told by the dealership my car needs all four fuel injectors replaced after running the diagnostic tests. After doing research it seems to be a common problem with this make and model car. I can’t believe with as many cars with this same issue and the safety issues with completely stalling in the middle of traffic there are no recalls on these cars.

The contact owns a 2025 Honda Accord. The contact stated that while driving at 60 mph, the vehicle intermittently stalled. While idling or utilizing cruise control, the vehicle suddenly accelerated to 70 after releasing the brake pedal. While entering the garage with her foot hovering over the brake pedal, the vehicle suddenly accelerated forward and crashed through the wall into the tv room. The brake light was flashing. There were no reported injuries, airbag deployments, fire or police report filed. The gas pipe was bent into the wall, but she was able to turn off the gas line. The vehicle was taken to the local dealer, who reset the computer and replaced the battery. The manufacturer was not notified of the failure. The approximate failure mileage was 6,090.

Upon commuting to work, the car failed to accelerate causing the car to almost suddenly stop while driving; at the same time of the failure warning lights and beeping occurred. No warnings prior to failure. By god’s grace, I was not yet on the expressway and avoided what would have been a horrible accident jeopardizing not only my life but the lives of anyone that would have been behind me. The gasket failed (cylinder #3) and is available for inspection upon request. It was a significant safety issue as the failure occurred without warning causing the car to stop no warning. Yes, the dealer has confirmed the failure and I was quoted a $5800 repair cost in spite of a owning a lifetime power train warranty. No, the vehicle or component has not been inspected by the manufacturer, police, or insurance. I did place a call to american Honda and we were given a case #15822812 (but this case has since been closed without action. ) no warnings occurred before the failure. (beeping and messages occurred at the time of failure. ) had the failure occurred at a high rate of speed, on an expressway, loss of life could have occurred and no one would know what caused the accident since cars are usually towed away and declared “totaled. ” fortunately, I was on a road of 35mph but in just a few more minutes would have been at a speed of 65mph. There is a further safety concern that the dealer admits that there is a known problem with the oem component but plans to continue to replace with the same product. Note: this car has a superior care record and only 110,000 miles which means the failure is likely to occur again with the same parts. Internet searches are confirming this is a known product failure with no recall.

Component/system: collision mitigation braking system (cmbs) or related software. Vehicle available for inspection. Safety risk: vehicle brakes or decelerates unexpectedly during normal driving, risking rear-end collisions. Most recent incident on August 23, 2025, required override by pressing accelerator and shifting to neutral in traffic. Reproduction: dealer could not replicate issue during may 16, 2025 visit. No diagnostic codes found. Radar and braking systems reported as “operating normally. ” a second evaluation occurred after September 5, 2025, with no resolution; issue persists. Inspection: inspected by Honda dealership twice—on may 16, 2025 (invoice #488382) and again after September 5, 2025. No third-party inspections. Symptoms: braking occurs in sport, normal, and econ modes. Happens when accelerating from stop or easing off accelerator. Brake light activates falsely. No warning lamps or messages prior to failure. Issue has occurred 10+ times over the past year. Related software issues: radio failure (resolved via software update). Clock shows incorrect time. Apple carplay fails to connect until restart. Navigation compass shows concentric circles.

This car came with problem and I want to this if Honda can fix it for free since its they mistake.

I have been having problems with many dashboard lights coming on at once. I got it checked out and I got abs code 123 - 11 and code 81 - 20. This has been going on since the beginning of August 2025. This could lead to dangerous malfunctions, and is one of the most expensive things to repair. It is my understanding that many many vehicles between 2013 and 2017 in the Honda range I've been experiencing this to the point of where we need a recall.

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I never was informed about the fuel pump recall , all the lights on my car came on , acceleration was slower , car was jerking , and when taking it to Honda they stated 2 of my cylinders has a misfire and water or coolant leaked and blew my head gasket , the car never ran hot and the guy asked did any light come on and I told him for some old reason every light on the dash was on and the car is vibrating while even in park reverse and when it's moving . I've read up on this and there are numerous of people with this same issue and this should mean something , Honda stated it would cost 6000 to fix when they should have already been warning people of the matter ahead of time . For some odd reason the car would just drive 10mph when I am driving jumping out in traffic having to pull over and restart the car . Guy at Honda even stated fuel pump could have been the issue and they have witness this with other cars like mine.

Unknown.

I tried to take my car to the dealer because my car brakes on its own and it had a alert that something was wrong with the air bags . I can ve driving anywhere and without reason the car breaks putting my life in danger and my family. I have tried to contact the dealer about this serious matter but I don't get anywhere. I am reaching out to see what solution we can come to ?.

Vehicle power loss and system malfunctions I am writing to formally express my concern regarding a recurring and potentially dangerous issue with my vehicle, 2023 Honda Accord hybrid. Twice while driving, the vehicle suddenly shut down on the freeway and completely lost power. In both cases, I was fortunately able to steer the car to the shoulder of the road, but this posed a serious safety risk. During these incidents, multiple system error messages appeared on the dashboard, including alerts related to braking, lane departure, and other critical functions. Alarmingly, this same issue has also occurred while the vehicle was parked in my garage. Each time, the only way to temporarily resolve the issue has been to shut off the vehicle and restart it. Upon restarting, the only remaining warning is related to the braking system, along with a prompt to bring the car to the dealership. If the vehicle is restarted again, all error messages disappear. I have contacted my dealership after each occurrence and brought the vehicle in for inspection. My car is currently at the dealership, and I am awaiting information on the cause of the problem and the proposed resolution. After the first time it happened, I have taken video/pictures of the errors and supplied same to the dealership. I consider this a serious safety concern—not only for myself but also for any passengers and other drivers on the road. Quite honestly, I am now afraid to drive the car, knowing that it could unexpectedly shut down at any moment without warning.

All lights on head dash are on , all components are not working properly or effected because of this. (engine light brake light abs light tire light traction control light , sensors out all) while driving vechile reduces power does not operate randomly , have to pull over shut the car off and turn it back on. Has high vibrations lot of shaking, stauling. I have had it looked at with multiple shops and dealer . Everybody is playing a guessing game and can not pin point what exactly it is . Was told it was spark plugs and coils, alternator , fuel injectors. All have been repaired, and still have all lights on dash and still facing every problem listed after repairs. Been inspected by manufacturer. Say not been resolved was told if it wasn’t what was already fixed they don’t know and that this is very common right now . It first started about a month ago.

Abs modulator assembly has left me stranded I see that this has been a major issue for Honda's. There has not been any recalls for this issue but they see that it is a major problem. I was told by king Honda in auburn alabama that this is a $2000 dollar issue and they do not know when the part will be available due to being on backorder. Please advise.

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Purchased new delivery date: August 13, 2024 this is an ongoing issue, car indicates radar needs cleaning. Each time I pull off road to check radar no such cleaning is needed, it's clean. Once the car indicates that the radar needs cleaning I loose multiple functions, cruise control, lane assist etc. Attached picture.

I was driving on the highway yesterday when all of a sudden several errors flashed on my dashboard, and my gas pedal stopped working. When I pulled over, I noticed an error code that read: "brake system problem. Brake performance may be reduced". Not only did I lose all acceleration control, but the error codes tell me there are brake issues. After researching online it seems like many others have experienced this issue and some people found the issue was caused by a faulty ignition control module.

My vehicle had been running fine up until the dash lit up, engine check turned on along with the tire pressure sensor and as of right now my car does not accelerate.

On 5/8/25 when the light turned green at the stop light, my car shut down while the gear was on drive. It immediately came back on with the dashboard showing warnings for the (tpms), brakes system, stability system, among others. I accelerated while on drive but the car did not move forward. I turned the flashers on. I had cars behind me honking and going around me. I put the shifter in park. A car behind almost rear ended me. I tried a second time to go by shifting the gear to drive but I had no luck. I put it back in park and turned it off. I turned it back on and the dashboard seemed fine, the car accelerated when I shifted it to drive. This is the second time that the same car shut down on me, the first time was over a year ago when the car was in motion at around 40 mph, I was able to pull over. The first time the dealer replaced a part and told me the problem was fixed. This time around the advisor said there's nothing they can do because they can't replicate the problem. It's very concerning because it can happen at any time anywhere at any speed.

The 1000 miles or so, when trying to increase speed, would feel the gears slip between revolutions. I would let up on the gas pedal then slowly resume pressure, which sometimes worked or sometimes didnt. On April 19th while going up a hill on a side road, the car stalled and transmission warning light came on. I pulled over and shut the car off and restarted was able to slowly continue up hill at 15 miles per hour with the slipping becoming worse ( this is when I first called Honda to bring it in on Monday April 21. ) I was able to arrive to work. After leaving work I pulled out of the parking lot and the car just stalled with all lights and warnings going off from engine to airbag warnings to tire pressure lights going off and dinging. This is when I called a tow truck to tow to the curtiss ryan dealership. After talking to them at dealer they told me that other Accords have had this problem.

The contact owns a 2023 Honda Accord. The contact stated that while attempting to park the vehicle, the brake pedal was depressed; however, the vehicle independently accelerated. The contact veered to the left and struck a cement pole on the front driver side, where the vehicle came to a stop upon impact. The cement pole did not show signs of damage after the impact. The contact then parked the vehicle at the scene. No warning lights illuminated; however, the message “initializing driving” was displayed. The vehicle was then towed to the dealer; however, the dealer declined to repair the vehicle because the vehicle was out of warranty. The driver’s and passenger’s side air bags did not deploy. A police report was not filed. There were no injuries sustained; however, the contact had a tight feeling in the right shoulder. The vehicle was not diagnosed or repaired. The insurance company was contacted. The manufacturer was notified of the failure, and a claim was submitted. The failure mileage was 45,606.

This vehicle was built terrible. It had a blown head gasket at 86,000 miles. The head was warped. My valve guides and seals were compromised and leaking into the combustion chamber. I need a full head resurfacing job with new gaskets all around. New injectors and new valve cover gasket and everything around. This car has a design flaw and needs to be recalled for mediocre heads life. It almost caused me to get crashed from the back from a semi truck because the car decided to lose complete power while on the road. The cars recalls have been addressed but this whole issue with the faulty heads needs to be addressed. My vehicle is in the shop now and I will have to pay a little over $4,000 now. It's a hazard on the road when you get near to 90,000 miles.

Vsa/abs module has gone bad. Loss of emergency braking.