2020 HONDA ACCORD Forward Collision Avoidance Warnings Problems

9 warnings lights turned on on my dashboard and when going slow and accelerating it brakes by it self also brakes on freeway going 70 mph and then recovers

On December 4 at 8:57pm I was driving on interstate 295 doing 60 miles an hour and my car’s warning light for breaking came up for me to break like something was in front of me even though there wasn’t, this is a continuing thing going on. I reported every time it happens.

Driving on a clear road on a clear day with no car in front of me, the brake warning flashed and then the car braked on its own. There was NO reason for the warning or for the car to brake on its own. Automatic breaking isn’t even a feature on this car.

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...

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 2nd occurrence since the first event on 21 April 2025. This occurred on the interstate. During this event, the vehicle's forward collision warning triggered an audible and visual alert that could not be shut off. 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 left lane. Traffic was very light. The weather was dark and dry. CMBS was on. ACC was off. LKAS was on. RDM was on. Problem has not yet been reproduced but dealer has verbally indicated that they...

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...

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...

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 5th occurrence since the first event on 21 April 2025. This occurred on the interstate. During this event, the vehicle rapidly decelerated from 65 mph to 25 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 (8:12 AM), I was in the left lane. Traffic was light. The weather was rainy and wet. CMBS was on. ACC was off. This very nearly resulted in total loss of control of...

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 6th occurrence since the first event on 21 April 2025. This occurred on the interstate. During this event, the vehicle rapidly decelerated from 45 mph to 30 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 (5:52 pm), I was in the left lane. Traffic was moderate. The weather was rainy and wet. CMBS was OFF. ACC was OFF. Problem has not yet been reproduced but dealer has verbally...

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...

On July 30, 2025, my Honda’s Collision Mitigation Braking System (CMBS) randomly activated without any obstacles in front of the vehicle. Since then, this issue has happened numerous times while driving. When the incident occurs, the system flashes a “Brake” warning and suddenly applies the brakes while I am driving. This creates a serious risk of a rear-end collision, loss of control, or bodily harm. I had the vehicle inspected by an authorized Honda dealership on August 1, 2025 for this issue. Despite the inspection, the malfunction continues to occur. Although I have not yet been involved in an accident, this defect poses an ongoing safety hazard for myself, passengers, and others on the road. I request that NHTSA investigate this matter.

During a forward-side lane departure collision in my 2020 Honda Accord, the Body Control Module (BCM), forward collision radar system, braking assist, and Vehicle Stability Assist (VSI) all failed to activate. As a result, the vehicle did not brake, warn, or stabilize before impact. The airbags also failed to deploy during the crash. My safety and the safety of others were put at serious risk, as the vehicle did not respond as designed despite being equipped with these systems. The car is now undrivable but available for inspection. This issue has not yet been confirmed by a dealer due to the car's condition, but similar failures have been reported in other 2020 Honda Accords already under recall. The insurance company did not request vehicle data and did not inspect the systems. There were no warning lamps, alerts, or messages prior to the failure; the malfunction occurred without notice. I am...

- 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...

CMBS not working properly. The car automatically brakes without any collision risk even on a clear road with no traffic and clear weather. Have a huge risk of someone crashing the car from the rear due to immediate braking. This issue has appeared several times.

All of the lights on my dashboard come on every few hours and go off. Vehicle is losing power as I drive. Multiple people with this make and model have expressed their concerns of the same issue.

Have taken my car to dealership 3 separate times for all warning lights illuminated. Last time they replaced the transmission for a CVT belt prematurely breaking and all codes went away for one day. Now all are present again. Emmisions system warning, lane departure warning, cruise control warning, exc. Every single light never goes out. Just spent 6k on a car that had under 100,000 miles because I was told it was the transmission belt only to come home and have the exact issues happen. The day it was taken to the shop, it stalled in the road and almost caused an accident on a major highway. At this point, I'm afraid to drive it.

I was driving along the NJ Turnpike at approximately 65 miles an hour when the brake warning light started flickering on and off and then the brakes engaged. It was quick, as if I had stepped hard on the pedal. No vehicle was in front of me, but I was driving through the express EZ Pass lane. Later that same day, it happened again, but this time it was only as if someone tapped on the brakes. The brake light flashed then too. To answer the above questions: What component or system failed or malfunctioned, and is it available for inspection upon request? The Collision Mitigation Braking System, and yes it is How was your safety or the safety of others put at risk? Someone could have rear-ended me Has the problem been reproduced or confirmed by a dealer or independent service center? No Has the vehicle or component been...

The contact owns a 2020 Honda Accord. The contact stated while driving at an undisclosed speed with no other vehicles nearby, the Forward Collision Warning system activated briefly, applying the Automatic Emergency Braking. The vehicle returned to normal functionality, but the failure became a regular occurrence. The brake alert warning light was illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Action Number: EA24002 (Forward Collision Avoidance Warning). The manufacturer was not notified of the failure. The failure mileage was 54,000.

Collision mitigation message turned on, took it in to dealer and they said sensor was coming up as malfunction and not aligned so they aligned it. Although sensor was aligned emergency brake still brakes without an obstruction in front. It has happened on interstate highway at speed limit where speeds are at 75mph.

Check engine, right mirror, door, alignment. My safety is not good, the car jerks and merging into another lane. Yes it has been inspected by insurance representative. It appeared when I was hit on 02/13/2024

Vehicle was being driven at 38 mph on a road with no other vehicles, bicyclists, pedestrians or other obstructions in sight when the "BRAKE" warning flashed on the dashboard and the brakes were immediately engaged, causing a hard stop. Had there been a vehicle following, it is likely that a rear end collision would have occurred.

As I was driving down the main road at 45 mph, no cars, animals or people anywhere around me, my 2020 Honda Accord Sport automatic braking system HARD BRAKED out of nowhere for no apparent reason! Thankfully there were no cars behind me or there would have been a crash!

This has happened more than one time.The first time it happened I was going down a 2 lane road no one in front or back of me and I was going 65 with my cruise set and the car slams on break and stays blink break on the dash. The second time it happened i was going down a 2 lane road at 45 no one around and it slams on breaks really hard and blinked break across the dash.

Driving on the interstate going about 60mph with no one in front of me or behind me and the car brakes by itself. This is the fourth time this vehicle has randomly brake

Today I was driving my Honda (Accord 2020) about 30 to 40 miles an hour and suddenly the car decided to brake for i guess a fraction of a second. It is hard to describe but literally felt that someone slam on the brakes. I also got the brake alarm and the sign on the dashboard "BRAKE" (orange sign). I was taken by surprise, even my wife asked me, what was I doing?. It was only a moment, but it was totally unexpected, lucky for me, there was no one in front or behind me. If you have questions please contact me at [XXX] or [XXX]. INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

The vehicle automatically turned on the forward collision mitigation system when there was nothing to avoid. Vehicle went from 55mph to 20mph in about 2 seconds. Fortunately there was no vehicle approaching from behind. I had no control over trying to override the braking system. Had vehicle checked at Honda dealership & was informed there was nothing they could do other than make a note of the issue.

CMS - collision mitigation system stops working completely. 2 warning lamps on dash. Cruise control completely inoperative. Vehicle was initially inspected by dealer on 11/19/21with DTC U0401-92 - Temporary stop of integrated driver support system (rejected control request), also found U0416-68 VSA system malfunction. This issue happens every 1-3 thousand miles. Also with the CMS/braking system, it will alert "brake" on dash and brake hard if encountering repetitive shadows from objects that are cast onto the road. My safety and others safety were compromised due to hard braking and cars behind me that then had to brake, nearly rear-ending my car.

Five times over two years, the collision mitigation system has activated while the car was in motion but no object was in front of the car. Three minor activations, meaning a brief yellow glow on the dash, have occurred. Two more significant activations have also occurred with a yellow rectangle on the dash with the word BRAKE visible. The most serious activation was at highway speeds. I was concerned that the car was going to automatically brake on the highway. I have returned this two year old car to the dealership multiple times for evaluation and have found little motivation on the part of the dealership to deal with this problem and other more minor problems the car is demonstrating. I consider the above complaint to be potentially life-threatening. I will not drive in this car unless the collision mitigation is turned off.

With seemingly no impediments ahead of it our 2020 Honda Accord will suddenly brake forcefully when changing lanes or exiting the freeway. it is not constant, but it is scary since there is no reason to brake at this point. this could cause us to be rear-ended the thing this system is supposed to keep us from doing. the dealer says unless it occurs when they drive it, unless, unless. The 'advisor' said he had heard of a few examples. they are all over the internet. What is being done to address this issue? oh, and he mentioned that we could always turn it off. we bought this car because being in our sixties and reflexes not necessarily being what they once were we wanted to avoid hitting someone from behind. this has happened on dozens of occasions. the listed date was the last.

CRUISE CONTROL NOT WORKING PROPERLY WITH THE SPEED AND CAR BRAKE BY HIMSELF ITS LIKE DETECT SOMETHING BUT IS NOTHING IN FRONT