Adaptive Cruise Control Problems of Honda Accord - part 1

My 2016 Honda Accord touring has an intermittent failure of multiple Honda sensing safety systems. The vehicle displays warnings for collision mitigation braking system, road departure mitigation system, adaptive cruise control, and lane keeping assist system. When this occurs, these driver-assistance and collision-avoidance features become unavailable. This is a recurring problem. In August 2023, an authorized Honda dealer diagnosed substantially similar symptoms. The technician documented dtc p2583-87, described on the repair order as “lost comm with the wave radar. ” the dealer removed the bumper, tested wiring between the radar and camera, checked radar power and ground, and diagnosed a faulty millimeter-wave radar unit. The Honda dealer replaced the radar assembly with part 36802-t2a-a05 and performed radar aiming/calibration. The repair order states that normal operation was restored. I paid $1,422. 08 for the repair and related charges. The problem has now returned and is intermittent. At times all systems work normally; at other times the multiple Honda sensing warnings appear together and the safety systems become unavailable. I am concerned that a previously replaced and calibrated Honda millimeter-wave radar/safety system has experienced a recurring failure. I am requesting that NHTSA review this issue and similar complaints to determine whether a safety-related defect exists.

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Vehicle started flashing all lights on dashboard. I drove it for awhile and then it eventually went off. A few days later same lights came back on a car started misfiring. Was told by Honda that is was the turbo that's going bad. Today is just cut off on me. Luckily there wasn't anyone behind me. I see a lot of people are having these same issues and a recall should be put out immediately.

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While driving home from work in my 2024 Honda Accord ex 1. 5t, multiple warning lights suddenly came on on the dashboard. Shortly afterward, I began smelling a strong gasoline/fuel odor inside the passenger compartment. I stopped the vehicle and got out. I could also smell gasoline outside the vehicle. I opened the hood and the gasoline odor was still noticeable from the engine compartment. Because I was concerned about the safety of the vehicle, I went to the nearest o’reilly auto parts and had the vehicle scanned. The diagnostic scan showed p0172 (fuel system too rich, bank 1), p0300 (random/multiple cylinder misfire), p0301 (cylinder 1 misfire), p0302 (cylinder 2 misfire), and p0303 (cylinder 3 misfire). The vehicle had approximately 82,063 miles at the time. The gasoline odor inside and outside the vehicle is especially concerning because of the potential risk of a fuel leak and fire. I checked my VIN for recalls and no open recall is currently listed for my vehicle. I am reporting this incident because I believe the fuel odor, rich fuel condition, multiple misfires, and dashboard warning lights may represent a safety-related fuel-system problem that should be investigated.

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The warning goes for everything that is on the dashboard. There are no safety features for the car that helps to protect the car and other cars. There are no warnings. This car is dangerous for everyone. No emergency brakes.

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I am reporting a recurring safety and mechanical issue with my 2018 Honda Accord 1. 5t, which currently has approximately 128,900 miles. My vehicle has been experiencing shaking/rough operation and multiple warning lights while driving. Diagnostic scans have shown p0301 – cylinder 1 misfire and u0401-68. The ignition coils were replaced with original/oem parts in an attempt to correct the issue. After the repair, the warning lights went away temporarily, but within several days the same warning lights and symptoms returned, and the vehicle again showed the p0301 cylinder 1 misfire code. I am concerned because the vehicle continues to shake and operate abnormally despite the repair. I have learned that Honda has addressed cylinder-head-gasket concerns involving certain 1. 5l turbocharged Accord vehicles, which may cause engine misfires. However, I have not had my vehicle diagnosed with a defective head gasket, so I am not claiming that this is definitely the cause of my vehicle's problem. When I checked my VIN through NHTSA, it showed 0 unrepaired recalls. I am submitting this complaint so that NHTSA has a record of the recurring problem and can determine whether my vehicle's condition may be related to a broader safety defect affecting 2018 Honda Accord 1. 5t vehicles. I am concerned about the possibility of the continued misfire causing loss of engine performance, loss of power, stalling, or otherwise making the vehicle unsafe to operate if the underlying problem worsens. I have photographs of the diagnostic scans documenting the codes and records showing the previous repair.

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The contact owns a 2020 Honda Accord. The contact stated that while driving on several occasions at various speeds, the messages "emissions system failure," "electric power steering failure," "hill start assistant failure," "collision mitigation," "collision road departure," "tpms failure," "brake system failure”, “brake performance reduced", "vehicle stability assistance failure," "adaptive cruise control failure", "road departure mitigation failure," and "brake hold system failure" were displayed. The contact stated that the check engine, tpms, brake system, traction control, and power steering warning lights were illuminated. The vehicle was taken to a dealer where it was diagnosed that the head gasket and turbocharger needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

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We were driving home after a day trip and the assisted everything (cruise control, power steering, adaptive lane control, brake assist), basically all of the driver assisted functions including the diagnostics for the phone app. We were about 60 miles from home in a remote area and the car said we could keep driving but to "call the dealer". We got home, made an appointment and after a couple days (we are 90 miles from the dealer) the car suddenly fixed itself. Dealer said "next time it happens bring it in". Yeah, these things only happen in the middle of nowhere at 10 pm. The car is brand new. I see there have been recalls in the past with issues like this on Hondas. This car should be on a watch for recalls.

While driving, the vehicle suddenly jerks or “jumps,” followed immediately by a noticeable loss of power. Shortly after this occurs, the multi-information display shows a series of warnings that include: collision mitigation braking system problem – see your dealer adaptive cruise control system problem – see your dealer road departure mitigation system problem – see your dealer auto high-beam problem – manual controls available – see your dealer brake system warning light a “systems initializing… continue driving” message also appears. I have photographic documentation of these dashboard messages. This sequence creates a significant safety concern. The sudden jerk and power loss can occur while the vehicle is in motion, and the subsequent disabling of the Honda sensing systems (collision mitigation braking, adaptive cruise control, and road departure mitigation) leaves the vehicle without those critical driver-assistance features. Because this involves sudden power loss and the disabling of safety systems, I consider the issue urgent and ask that it be prioritized.

This incidence occurred twice, one year apart, under the same driving and weather conditions and on exactly the same route. On xxx, after departing [xxx], we were driving north on [xxx] near [xxx], with the adaptive cruise control set to 70 mph. Suddenly the dashboard displayed the warning, “some driver assist systems cannot operate: clear area shown,” and the Honda emblem indicator illuminated. Following the vehicle’s instructions, we stopped and cleaned the Honda emblem by wiping and rinsing it, but the warning remained. After we continued driving north on [xxx] for approximately three to four hours, the warning cleared without further action. The weather was clear and sunny. An identical incident occurred one year earlier, on xxx, along the same section of northbound [xxx] and under the same driving and weather conditions. Accord was also set to 70 mph with adaptive cruise control engaged. That warning again cleared on its own after a few hours. In addition, while driving in the left lane on xxx with adaptive cruise control engaged, Accord braked aggressively while passing semi-trucks traveling in the right lane, even though there were no vehicles ahead. This happened several times. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

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I am reporting a safety concern involving my 2018 Honda Accord. I purchased my vehicle used in January 2024 at approximately 90,000 miles and have kept up with the recommended maintenance during my ownership. At approximately 120,000 miles, a Honda dealership diagnosed head-gasket failure with coolant intrusion involving cylinders 3 and 4. Before diagnosis, the vehicle experienced rising engine temperature while idling, coolant loss, jerking during acceleration, numerous warning lights, and severely reduced acceleration. The problem progressed to loss of power and stalling while driving and slowing/stopping, requiring me to place the vehicle in park and restart the engine to continue driving. The vehicle also developed unstable rpms and engine surging while in park. Honda performed a cooling-system pressure test and borescope inspection and confirmed coolant intrusion. Head-gasket replacement cost approximately $5,000. I contacted american Honda (case #16533411), but goodwill assistance was denied because the vehicle is outside warranty and Honda stated it had no Honda-dealership service history. I am reporting this because the head-gasket failure resulted in loss of propulsion and stalling while operating the vehicle, creating a serious safety concern.

Subject of complaint: sudden, simultaneous failure of critical safety and driver assist systems originating from an electronic sensor/control module failure inside the electronic power steering (eps) gearbox. Description of safety hazard and dashboard indicators: while operating the vehicle, the driver information interface (dii) suddenly illuminated with multiple critical safety faults simultaneously. The primary indicator was the amber electric power steering (eps) system problem warning light (steering wheel icon with an exclamation point). Due to the electronic architecture of the vehicle, the loss of reliable data from the steering gearbox caused a cascading failure across the Honda sensing safety suite. The dashboard displayed a sequence of distinct system errors, explicitly disabling: lane keeping assist system (lkas) problem road departure mitigation system problem adaptive cruise control (acc) problem safety risk to occupants: the unexpected failure of the eps system immediately compromised the vehicle's handling characteristics, significantly increasing the steering effort required to control the vehicle. Furthermore, the simultaneous and total disabling of the lane keeping assist, road departure mitigation, and adaptive cruise control systems unexpectedly stripped away active crash-avoidance features. This sudden degradation of vehicle control and driver-assist capabilities creates an immediate, severe collision hazard on public roadways.

These 9 things are on my dashboard- I’ve called Honda corporate to see if they could do something about this because I’m not the only one with this problem. My car is now barely drivable and the dash have not went away emission system road departure mitigation system brake system problem collision mitigation braking system hill start assist problem adaptive cruise control system vehicle stability assist system problem electric power steering system.

On July 4th 2026, I was leaving from a restaurant that evening and within 5-10 seconds of me turning my car on, all of the lights on my dashboard turned on. I was slightly confused because there were multiple at once and my car was rumbling a bit from under the engine hood. Within a few weeks prior, I’ve been having with my digital car screen switching back and forth between tabs (from the radio, to my carplay, to the settings). It will be intermittent but fairly consistent. I plan to take my car to an auto parts store for a code test and battery/alternator test to see if there’s any further issues. I just purchased a new battery for this car within the 3 years of me getting it, 2 years ago and there shouldn’t be any issues. I’m not sure how to proceed and I really don’t have it in me to spend large amounts of money and time with repairs for a supposedly heavily reliable car. My current mileage is at 120,000.

There are 13 alerts showing on the instrument panel for various systems not functioning, along with accompanying yellow dash lights such as tire pressure, abs, brake system, traction control, acc, and lkas. Systems not available include, abs system, adaptive cruise control, road departure mitigation, auto high-beam, tpms, electric power steering, plus several others. These alerts first started January 2026 and occasionally would disappear; however, over the past few months the warnings have become constant. The vehicle has approx. 120,000 miles. Due to tpms not functioning, I am not given a warning when a tire has gone flat/blown while driving as the tire pressure light is always on the dash. The only warning I am provided is the sound/smell of the rim dragging along the road to notify me the tire is flat. This poses a risk to myself and others by creating an emergent situation requiring me to pull over rapidly. Another incident occurred when acc was enabled (at a time when the alerts had been appearing on and off). Cruise control set at 70 mph when suddenly the above mentioned alerts reappeared and acc system became unavailable, leading to unexpected deceleration on the highway. This poses a risk to myself and others as it creates unpredictable driving patterns, unbeknownst to the driver. Initially I replaced the battery with no resolution of the issue. I later discovered maintenance code displayed by the vehicle was c003a-62 for right rear wheel speed sensor circuit failure (circuit short to ground or open). The mechanic recommended replacing the right wheel hub assembly as this was suspected to be the cause of failed circuit. When that repair lasted no more than 10 mins before the warnings reappeared, the right rear wheel speed sensor itself was then replaced. Similarly, this did not fix the issue. I have not sought additional service due to repair costs beginning to add up with no resolution. Based on the history of reports, this issue does not seem uncommon.

The car has had the code p0045 turbocharger. Honda was supposed to had repaired it but then the next week it had the same code and problem and they had it for 5 days. I got it back and less than 48 hours the same code came on.

I am submitting a safety complaint regarding my 2019 Honda Accord lx. While driving, a yellow “brake system” warning light appeared on the dashboard. The vehicle continued to drive normally, and no obvious braking problems were noticed at that time. However, the warning remained illuminated while driving. In addition, I experienced intermittent episodes where pressing the accelerator pedal did not immediately increase vehicle speed. There was an approximately 1–2 second delay before the vehicle responded to throttle input. This occurred while the vehicle was in motion and could create a potentially dangerous situation in traffic. After turning the vehicle off and restarting it, the warning light disappeared. The issue appears intermittent. The brake fluid level is normal, and no diagnostic trouble codes were detected with a basic obd-ii scanner when the warning was present. After researching the issue online, I found multiple owners reporting similar symptoms involving brake system warnings and temporary loss of accelerator response on Honda Accord vehicles. I am concerned that this may indicate an electrical, braking system, sensor, or software-related defect that could affect vehicle safety. I request that NHTSA investigate this issue and determine whether a broader safety concern exists.

The car keeps giving me misfires.

The contact owns a 2018 Honda Accord. The contact stated that while driving at 45 mph with the cruise control engaged, the brakes suddenly applied without application. The brake message was displayed. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified about the failure. The approximate failure mileage was 99,735.

I’m taking my car to the body shop over five occasions and have to take it back one due for it being a computer chip, which was replaced, but the lights on my dash all of them comes on after the second start up. Cruise control doesn’t work brake code doesn’t work all the lights for staring brakes says to check everything.

- the car's automated systems randomly applies severe breaking at improper times - the cars head gasket has blown and in turn has blown the radiator and thermostat.

Infotainment center: I am submitting this complaint regarding my 2021 Honda Accord sport and the ongoing issues I’ve experienced with its infotainment system. This problem has been persistent, unpredictable, and increasingly concerning from both a usability and safety standpoint. Since purchasing the vehicle, the infotainment center has repeatedly malfunctioned without any warning. The screen will freeze, switch from setting to setting, or become unresponsive to touch input. At times, it will randomly reboot while I am driving. These issues occur regardless of whether I am using navigation, bluetooth audio, or even when the system is idle. This also affects the adas, periodically, warnings will be displayed, and then not show up. What makes this especially troubling is how it affects my ability to safely operate the vehicle. For example, when the system freezes, I lose access to navigation directions mid-route, which forces me to either drive without guidance or attempt to troubleshoot the issue while on the road. Similarly, when using hands-free calling or music controls, the glitches can be distracting and require repeated attempts to regain control, taking my attention away from driving. I rely on my vehicle daily, and this ongoing issue has caused a great deal of frustration and concern. A modern vehicle’s infotainment system is not just a convenience—it is integrated into essential driving functions. When it fails, it directly impacts driver awareness and safety. I am requesting that this issue be investigated further, as it appears to be a systemic problem rather than an isolated defect. I hope that by reporting this, it may help lead to a resolution for myself and other drivers experiencing similar problems.

The day I purchased the vehicle from the dealer, every warning light began cycling on including the automatic emergency braking failure, engine system failure and others. I immediately took the car back to the dealer and they supposedly repaired it. When the car was returned to me, I drove it for less than a week and the same thing happened again. When the light came on, the car’s auto braking and cruise control stopped working. I took it back to the dealer and they said it was the head gaskets, which they fixed. When I got the car back again, I drove it for 2 days and it did the same thing again, this time all of the warning codes came on. This time, I had a total engine failure because the timing chain broke. The dealer took almost two months to replace the engine and it cost us almost $6,000. I got the car back last Saturday. Today, driving home from work, the automatic brake system failure warning came on again and the car won’t automatically brake and cruise control wouldn’t work. This is exactly what happened last time. I am afraid to drive this car because I don’t know if the brakes will fail and the system currently isn’t working. We are taking it back to the dealer which will likely cost us more money. We are stuck with this car and cannot get rid of it because we owe more money on it then it is worth because of replacing the engine.

Car went into limp mode.

Dashboard shows that there is a problem with the adaptive cruise control system, lane keeping assist system, road departure mitigation system, and automatic high beams. Message occurs intermittently, usually lasting a few seconds, and goes away. Can happen while driving or while parked. Usually occurs a handful or times per day. Seems to happen more frequently when engine bay is warmed up. This is a safety issue because it suddenly and unexpectedly disables the advanced driver assistance systems. For example, while driving on the highway, cruise control and lane keeping assistance will turn off suddenly, forcing the driver to intervene with all of these systems at once. This also has other implications, like automatic emergency braking not functioning correctly to help prevent an accident. Vehicle has been brought to various Honda dealers a total of three times. A case has been opened with american Honda motor CO, but no solution to the problem has been found.

There has been no incident with my vehicle but I am writing to look into this issue. I see several threads online regarding these warning lights that just randomly pop up without any indicator of a problem with the vehicle. This stops all these assistive features from responding if there were a hazard. Please look into this because Honda is not responsive to the recall issue.

While driving my 2018 Honda Accord sport 1. 5t, multiple warning lights suddenly illuminated on the dashboard at the same time and several warning messages appeared. The vehicle displayed warnings for different systems, including a message stating, “hill start assist problem. Vehicle may roll upon brake release. See your dealer,” along with the check-engine light and several other warning indicators. I purchased this vehicle brand new in 2018, and since the day I purchased it, I have consistently had the vehicle serviced and maintained at an authorized Honda dealership. I have relied on Honda to perform the recommended maintenance and address any problems with the vehicle. When all of these warning lights and messages appeared, I took the vehicle to the Honda dealership. The dealership adjusted the valves and told me that everything was fine. Approximately one week later, I had to take the vehicle back because the problem was not resolved. At that time, I was told that the vehicle needed a head gasket. The vehicle had also previously required a turbo replacement. Because of the seriousness of the head-gasket diagnosis, I obtained a second opinion from another repair facility, and they also determined that the head gasket was the problem. I do not understand how a vehicle that I purchased new and have consistently maintained through Honda could experience these significant engine-related problems. I am especially concerned that numerous unrelated warning lights and safety-system messages appeared simultaneously before the head-gasket problem was diagnosed. I am submitting this complaint because I believe this issue should be investigated to determine whether other 2018 Honda Accord 1. 5t vehicles are experiencing similar head-gasket, turbo, and multiple-warning-system problems and whether these failures may represent a defect that should be addressed by Honda or through a recall.

The lights and warnings below popped up on my dash after the engine light had come on and then off again for about a week. See below, -emission system problem avoid heavy acceleration and high speed. See dealer -tpms light -brake system problem -brake hold system problem -electric power steering system problem -vehicle stability assist system problem -hill start assist problem -adaptive cruise control system problem -collision mitigation braking system problem -road departure mitigation system problem went to get diagnosed at the dealership and was told that the turbo on my engine had failed. Mechanic said it had nothing to do with me and that it failed on its own. I saw that it was a reoccurring problem with other Honda owners with the same year, make, and model as mine but are being given the run around and no solution.

While driving in a busy area with pedestrians and other vehicles, my car hard braked out of nowhere to a complete stop for no reason. I was nearly rear ended. The adaptive cruise control shuts off completely after 15 minutes in use. Says to take it to the nearest dealership. Turning off and restarting the car gets rid of the notification.

Multiple warning lights on dashboard. Vehicle runs perfectly fine with brand new battery and spark plugs but still has 9 random warning lights coming on.

Complaint regarding ongoing issues after turbocharger repair – 2019 Honda Accord I am submitting a complaint regarding ongoing issues with my 2019 Honda Accord after a turbocharger-related repair. The initial diagnostic code associated with the vehicle was p2563 (turbocharger boost control position sensor circuit range/performance). After the turbocharger/wastegate repair, my vehicle began displaying multiple system warnings, including: * emissions system problem * acc (adaptive cruise control) warning * collision mitigation system warning * lane departure/lane keeping assist warning * electric power steering warning * stability/traction control warnings * tpms (tire pressure monitoring system) warning after the repair, the vehicle began jerking and experiencing a loss of power. Multiple warning lights appeared. While the warning lights temporarily cleared after a couple of vehicle restarts, they later returned and continue to reoccur. I subsequently took the vehicle to Honda, where I was informed that a sensor required recalibration. Despite having the sensor recalibrated, the issues have continued, and the warning lights continue to return. I am requesting that Honda investigate whether the repair, wiring, sensors, modules, calibration, or the turbocharger system itself may have contributed to these ongoing problems. I have also noticed that many Honda Accord owners are reporting similar turbocharger-related issues and multiple warning lights appearing. This appears to be a very common issue among affected vehicles, and I believe it warrants further investigation to determine if there is a larger underlying problem affecting these vehicles. I am requesting that Honda review this matter, document these concerns, and provide a proper resolution. Thank you for your attention to this matter.

What component or system failed or malfunctioned, and is it available for inspection upon request? the electrical system on my Accord and yes it will be available. How was your safety or the safety of others put at risk? the vehicle starts to not pick up speed and eventually kills. Has the problem been reproduced or confirmed by a dealer or independent service center? has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? by the manufacturer (dealership) on multiple occasions, I was instructed to unplug the vehicle’s battery. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? yes, about a year and a half ago.

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All light come on brake system, acc, road migration, collision migration, hill start assist problem, vehicle stability system, electrical power steering, and it will not go when at a light. Almost causing a car accident.

The multifunction adas camera module failed due to "internal error" at only 9 years old. This means that critical safety systems such as automatic emergency braking/lane keep assist malfunctioned and could not assist with avoiding collisions. I took the car to the dealer and they confirmed the issue, and charged me $2000 to fix this critical safety system. I noticed that the new camera assembly has an updated part number, indicating that Honda might have been aware of this failure issue. I have also seen some forum posts online of others having this failure with their 2016-2017 Accords with Honda sensing. Therefore I believe this should warrant a recall. When the failure first occurred upon vehicle startup a few days before I had it repaired, all these systems were disabled and there were multiple warning lamps on the gauge cluster and screen. Prior to this sudden failure, everything had been working fine as intended up until the very day it failed.

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Experiencing an ongoing issue where multiple warning lights appear on the dashboard at the same time. The lights include several safety and system warnings, making it look like many different systems in the vehicle are malfunctioning simultaneously. Even after repairs were made, the dashboard warning lights continue to stay on or return shortly after. It has become frustrating because the vehicle continues to show problems even when something has already been fixed. This is a safety concern. How can we know if something is actually malfunctioning if codes are being thrown, constantly?? we also can’t use the safety features included with the vehicle when this is happening. Having so many warning lights on at once also creates concern about the reliability and safety of the vehicle, especially since several of the warnings relate to important systems such as braking, driver assistance features, and engine performance. Repairs aren’t helping and I’m seeing sooooo many other 2018 Accord owners with the same issue, as has been documented with this site, NHTSA.

The contact owns a 2024 Honda Accord. The contact stated that on several occasions while driving at undisclosed speeds, the vehicle unexpectedly came to a stop without the brake pedal being depressed. The “brake” message was displayed on the instrument panel. The failure occasionally occurred while the cruise control feature was activated. The contact received notification of NHTSA campaign number: 25v785000 (electrical system). Additionally, occasionally the electrical system was inoperable, and the instrument panel failed to function properly, and the trunk and fuel door unexpectedly opened. The contact also stated that the automatic door locks failed to function properly, requiring several attempts to enter the vehicle. The vehicle was taken to several dealers; however, the vehicle was not diagnosed or repaired. The manufacturer was made aware of the failures, and the contact was offered a buyback option for the vehicle. The contact expressed concerns that, due to the multiple failures, the vehicle was unsafe to operate and created a hazardous condition, because the vehicle was almost in a crash with children inside the vehicle. The approximate failure mileage was 33,000.