Adaptive Cruise Control Problems of Honda Accord - part 1

Summary of incident: for approximately two years, my vehicle has experienced random electrical issues. All dashboard warning lights will flash at random times. When I take the vehicle to the dealership (bell Honda), the problem disappears before it can be diagnosed. On September 27, 2025, and again on September 28, 2025, the vehicle completely stopped and shut off while I was driving. It would not restart. The hazard lights were stuck on and could not be turned off. This left me stranded and in a dangerous situation. After approximately 2-3 minutes, the vehicle was able to restart, but numerous warning lights remained illuminated on the dashboard. I had the vehicle tested with a diagnostic tool at an autozone, but no apparent issues were found in the system. Additional information: this is an ongoing and unresolved safety issue that Honda has failed to address. This electrical problem, which causes the vehicle to shut down unexpectedly, is a significant safety hazard. This issue is in addition to another ongoing problem with the remote start system, which Honda has refused to diagnose and fix. Consequences and concerns: the unexpected shutdown of the vehicle while in operation is extremely dangerous and could lead to a serious accident. The inability to use hazard lights properly further increases the risk to myself and other drivers. The intermittent nature of the problem makes it difficult to diagnose, but the consistent occurrence poses a serious risk that requires immediate investigation by Honda and the NHTSA.

See all problems of the 2023 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.

When it is cold outside my acc light comes on and when I started my car the other day it read emissons service problem avoid heavy acceleration and high speed. That was just 1 among 7 other service warning that popped up.

See all problems of the 2018 Honda Accord 🔎.

My son was driving home from work when car suddenly went into limp mode with check engine light and all other safety light came on the dash. Driving around 50mph and my son nearly collided with multiple cars as the became hard to steer and brakes unreliable. Luckily no one was hurt this time. Car has 83k miles. Was taken to the dealer and diagnostics run and provided with a $5000. Repair to replace the head gasket due to coolant leaking into cylinder #3 causing misfires. I have reached out to Honda of America with the issue.

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All 4 warnings came on about a month ago - no safety systems & no cruise control at all. I could drive 50 miles and they'd go off until eventually they did not. Now I find through the forums that this is very common for the 2017 Honda Accord & hybrid! and, the dealers knowing this are charging over $2,000 for a simple camera! so, they know these have a high failure rate, are not fixing them, and are price gouging us! please help us all on the roads out there!.

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Advanced driver assistance systems (adas) this has been ongoing since I had the car and have taken to dear ship several times and they say it to happen, so they get the messages and the messages are there. I look it on google and there have several complaints about this issue and I have Honda and they are very rude about it, I have even call here and the young pay no mine what soever told me to call Honda I need mt=y problem resolve please, I am scared to drive my out state , I am [xxx] and live in north carolina and these people cannot drive. I have pictures which I sent as attachments. Somebody please help me. My payments' are 655. 00 a month and need to fill safe driving this vehicle information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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.

See all problems of the 2024 Honda Accord 🔎.

Head gasket blown on a 2018 Honda Accord 1. 5 turbo. Yes, yes warning lights have appeared.

I had been driving down highway and all of a sudden my car put on brakes hard. Thank goodness no one was behind me. I had dealer turn off that feature so it wouldn't happen again. I still experience my brake light flashing when nothing in road to brake for but doesn't brake on its own. Issue having now is issues starting car and once it starts I recieved a collision mediations issue pop-up on display saying see dealer now. Cruise control issue, and on dash has traction control saying ignitionating continue driving. The braking issue started right after purchase in 2018. The starting issue started yesterday 7/25/2025.

All warning lights turn on on the dash board. I replaced the battery, airbag module, and abs module and I'm still having the same issue.

I was behind another vehicle with the adaptive cruise control on and been following the for some distance at a speed below the cruise control setting. Warning came on for the braking mitigation, cruise control disengaged, vehicle began coasting but did not brake. I continued home driving without any other changes, but warning stayed on. After arriving turned vehicle off and restarted, warning did not come back on. I have not driven vehicle since. I checked and found other reports of similar problems and am filing this report. Will continue driving with extra caution and report any other occurrences.

My car started shaking like it didn’t want to go. My engine light came on. Then it showed road departure mitigation system problem, collision mitigation system problem, adaptive. Those control problem, and emissions system problem then says engine is not functioning properly.

On [xxx] my car while driving suddenly reported abs brake system failure, together with that other warnings flashed adaptive cruise, ps system (eps) failure etc. With difficulty I was able to stop the car and pull over. Same day I called Honda service hq and lodged a complaint case number [xxx]. The car has 57,478 miles and is properly maintained. Honda suggested that I drive the car over to a dealership. I am unwilling to drive due to serious safety concerns. Another followup email was sent on July 8th to acs@ahm. Honda. Com but has resulted in no response. I am a [xxx] and even though its a serious safety incidence, Honda has shown no signs of concern . Please advise and help me out, the company should get it towed and fix the issue free of charge. Thank you information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Unknown.

The contact owns a 2017 Honda Accord. The contact stated that there was a failure with the adaptive cruise control (acc) and lane keeping assist system (lkas) system. The contact stated that while driving at an undisclosed speed, the lkas and adaptive cruise control messages were displayed. The local dealer was contacted, but the vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 150,000.

Car goes in limp mode once the brake system lights come on. When the brake light system comes on, none of the functions for the automatic breaks or electrical portion of my vehicle works. The car will act as if it will not accelerate right before the codes start to appear on the car.

The vehicle has an emission system error along with all other errors, car also hesitates to accelerate. Yes it is dangerous a failing turbocharger can result in a noticeable decrease in engine power, especially at higher speeds. Diagnostic : confirmed by dealership. The car was looked at the dealership mechanics nothing happened to where I need any others. It’s just been lagging getting up into speed etc. It popped up a month ago the emission light and went away. Came back two days ago which today is 6/20. Engine system problem tire pressure monitor system electric power steering problem cmbs problem adaptive cruise control problem cmbs problem all lights flashes on screen.

This is about the 5th time this has happened to the car. All warning lights appeared spontaneously while driving. The lights would turn off if the car was turned off for a long period of time or is we disconnected battery for a long period of time. We have tried to research the problem and no one seems to know what the cause or permanent fix is.

The vehicle was totally inoperable and suddenly came to stop was lucky that was driving in a local road where there was no vehicle, suddenly all different warning signs were coming on the dashboard and couldnt drive at all and vehicle was totally stalled. It was very dangerous situation luckliy I was just came off a very busy road otherwise coudl have been major incident. Currently the vehicle is at dealership nto sure what they will say but just wanted to report this as it is very dangerous situation.

The contact owns a 2016 Honda Accord. The contact stated that the messages "adaptive cruise control failure", "lane keep assist failure", and "forward collision avoidance failure" were displayed. Additionally, the contact stated that the infotainment system made an abnormal, loud, startling, and static sound intermittently while driving. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not notified of the failure. The failure mileage was approximately 196,000.

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It is uncertain which specific system/systems have failed/malfunctioned at this point. Despite frequent and consistent communication with Honda, no real attempt has been made to uncover the cause of this issue, and no solution has been provided. The vehicle has been, and is, available for inspection upon request. This is the 7th occurrence since the first event on 21 April 2025. This occurred on the interstate. During this event, the vehicle rapidly decelerated from 70 mph to 60 mph without the ability of the driver to intervene or take back control of the vehicle. This led to a very near miss as traffic was rapidly approaching the rear of my vehicle. At the time of the incident (6:21 pm), I was in the right lane. Traffic was heavy. The weather was overcast and dry in tire path. Cmbs was off. Acc was off. Problem has not yet been reproduced but dealer has verbally indicated that they get frequent complaints about the system. This includes one employee who has experienced this on his personal vehicle. Many dtcs have been recovered from the vehicle’s log. Manufacturer: yes, vehicle has spent 30 days, to date, in custody of Honda police: not yet. Will do immediately if advised insurance representatives: not yet. Will do immediately if advised others: no. Any work on the vehicle performed outside of Honda east cincinnati will void the warranty no warning or alert (audible or visual) lights were present before, during, or after the event.

See all problems of the 2020 Honda Accord 🔎.

If car is idling for over 1 minute, all lights on dash come on. When all lights on, car wont wont go over mph, car will randomly sputter in highway when going over 1rpm and will stall randomly. Reported on reddit by multiple people and when I went in to get it diagnosed it was the fuel injector issue.

It is uncertain which specific system/systems have failed/malfunctioned at this point. Despite frequent and consistent communication with Honda, no real attempt has been made to uncover the cause of this issue, and no solution has been provided. The vehicle has been, and is, available for inspection upon request. This is the 4th occurrence since the first event on 21 April 2025. This occurred on the interstate. During this event, the vehicle rapidly decelerated from 70 mph to 55 mph without the ability of the driver to intervene or take back control of the vehicle. This led to a very near miss as traffic was rapidly approaching the rear of my vehicle. At the time of the incident (8:09 am), I was in the right lane. Traffic was very light. The weather was overcast but dry. Cmbs was on. Acc was on. Problem has not yet been reproduced but dealer has verbally indicated that they get frequent complaints about the system. This includes one employee who has experienced this on his personal vehicle. Many dtcs have been recovered from the vehicle’s log. Manufacturer: yes, vehicle has spent 30 days, to date, in custody of Honda police: not yet. Will do immediately if advised insurance representatives: not yet. Will do immediately if advised others: no. Any work on the vehicle performed outside of Honda east cincinnati will void the warranty no warning or alert (audible or visual) lights were present before, during, or after the event.

It is uncertain which specific system/systems have failed/malfunctioned at this point. Despite frequent and consistent communication with Honda, no real attempt has been made to uncover the cause of this issue, and no solution has been provided. The vehicle has been, and is, available for inspection upon request. This is the 3rd occurrence since the first event on 21 April 2025. This occurred on the interstate. During this event, the vehicle rapidly decelerated from 70 mph to 65 mph without the ability of the driver to intervene or take back control of the vehicle. This led to a very near miss as traffic was rapidly approaching the rear of my vehicle. At the time of the incident, I was in the right middle lane. Traffic was light. The weather was clear and dry. Cmbs was on. Acc was off. Problem has not yet been reproduced but dealer has verbally indicated that they get frequent complaints about the system. This includes one employee who has experienced this on his personal vehicle. Many dtcs have been recovered from the vehicle’s log. Manufacturer: yes, vehicle has spent 30 days, to date, in custody of Honda police: not yet. Will do immediately if advised insurance representatives: not yet. Will do immediately if advised others: no. Any work on the vehicle performed outside of Honda east cincinnati will void the warranty no warning or alert (audible or visual) lights were present before, during, or after the event.

• head gasket • none of the safety features work when there is a head gasket issue. Power steering is reduced as well as break performance • confirmed by Honda dealership with a boroscope • Honda • no warning, Honda at first thought it would be fixed by fixing the factory recalls. Light went away prior to taking it in and then looked in to it 2 weeks later and diagnosed head gasket failure.

- component/system failure/malfunction: adas. Specifically, cmbs and/or acc. - my car has repeatedly experienced unexpected braking events, rapidly bringing me to nearly a complete stop in the highway. During this time, I have no ability to control the speed of my vehicle. This has been occurring during my ~70 mile commute on I-675, I-75, and I-275. - despite having the car on multiple occasions and for over a week collectively, the issue has not been replicated by the dealer. - the vehicle has not been inspected by the manufacturer, police, insurance representatives, or others to date. The Honda dealer has not initiated any further inspection. - during these failures, the car has (often) been braking without due reason or any alert to the driver. No system malfunction was found (either shown to driver or in computer log, as verified by dealer). Please review attached document for further details regarding the incident(s). This copy has been presented to Honda and the ohio attorney general.

It is uncertain which specific system/systems have failed/malfunctioned at this point. Despite frequent and consistent communication with Honda, no real attempt has been made to uncover the cause of this issue, and no solution has been provided. The vehicle has been, and is, available for inspection upon request. This is the 1st occurrence since the first event on 21 April 2025. This occurred on the interstate. During this event, the vehicle rapidly decelerated from 75 mph to 20 mph without the ability of the driver to intervene or take back control of the vehicle. This led to a very near miss as traffic was rapidly approaching the rear of my vehicle. At the time of the incident (5:10 pm), I was in the left lane. Traffic was moderate. The weather was clear and dry. Cmbs was on. Acc was (status unknown). Lkas was on. Rdm was on. Problem has not yet been reproduced but dealer has verbally indicated that they get frequent complaints about the system. This includes one employee who has experienced this on his personal vehicle. Many dtcs have been recovered from the vehicle’s log. Manufacturer: yes, vehicle has spent 30 days, to date, in custody of Honda police: not yet. Will do immediately if advised insurance representatives: not yet. Will do immediately if advised others: no. Any work on the vehicle performed outside of Honda east cincinnati will void the warranty no warning or alert (audible or visual) lights were present before, during, or after the event.

Every light on my dashboard came on at once. I took it to a Honda dealership for a diagnostic check and they said it was my turbo but every light is still on.

While driving on the interstate, suddenly got 6 different ‘warning’ messages on the dashboard. Most of them involved the brakes. Emergency brake malfunction, brake hold malfunction, forward collision malfunction, adaptive cruise control malfunction, brake system malfunction (use of brakes may be reduced), and road departure mitigation malfunction.

All warning lights have turned on my dash. Ive done research and this is happening a lot of people that own 2018-2020 Honda Accord 1. 5l.

The car is braking even when there is no obstacle or vehicle ahead. I have not driven at higher speed but I fear that if that happens, it can cause incident and injury.

All of sudden, no incident, no accident, a lot of things were disabled such as adaptive cruise control , forward collision warning , lane departure warning and more while I was out of town (long range highway travel). When I went to Honda dealership, they blamed a few things and fixed them (expensive), then they said that the front camera needed a calibration. It was expensive. After that aiming correction, everything works fine. The camera was not broken. It just needed recalibration, and it costed about a thousand dollars. I would say it was caused by the poor design, which is Honda's fault. I googled this issue and found a lot of Honda owners had same issued and charged 1k ~2k for it. I will report it separately, but my Honda odyssey has the exactly same issue now. I have 2 Honda cars, and both of them have the same issue. I strongly suggest that Honda should recall their front camera and they should reimburse the expense we already paid for it.

I recently took my car to the dealer because I have multiple messages on my dashboard saying please see dealer dealing with my brake system, electric power steering, vehicle ability assist, collision mitigation system problem, etc the dealers don’t know what’s going on with it. I recently had service done on it because of the recall with the fuel pump and even before that those messages were showing up.

I feel like my car should be under recall it’s so many other who experiencing the same thing. All of my lights are on, on the dash. Check engine light down to my cruise control not working. As I drive it’s stalling and jerking. I went to the dealership to have my spark plugs and my fuel injectors replace and it started back doing the same thing. Spent thousands just to be going through the same exact thing.

I was driving on a highway when the engine light came on and the car immediately started slowing down even though I was pressing the gas pedal. It flashed there was a failure of the brake system, collision mitigation braking system, road departure mitigation system, hill start assist system, and adaptive cruise control system. The check battery light also came on. The car decelerated on its own with brakes engaged. I had to choice but to immediately pull over and luckily was able to steer to an off ramp and into a parking lot.