2020 Honda Accord Hybrid Complaint Log

I am reporting a potential safety issue with my 2020 Honda Accord Touring Hybrid. On September 4, 2025, my dealership identified a non-genuine purple quick-splice connector in the driver’s door harness, which they attribute to error codes B1142 (Driver’s Door Lock Knob Switch Circuit), U0199 (Lost Communication with Driver’s Door Module), and U3003-16 (Electric Servo Brake Control Unit Power Source Low Voltage). This connector, not installed by the recent audio installer who put only upgraded speakers and deemed non-Honda, may be an aftermarket modification (possibly an alarm/tracker or anti-theft device) causing electrical faults. While no water was found, the issue could impact brake assist (U3003-16), posing a safety risk. I request NHTSA investigate whether this reflects a widespread manufacturing or modification defect, especially given reports of similar quick-splices at dealerships for repos or fleet locking. A Reddit user said, “ We see these at our dealer frequently. Those are quick-splices, usually used to piggyback off your oem wires to supply voltage/signals to an aftermarket alarm/tracker. Other dealerships install this in the event of repos/auto locking an entire fleet/or additional anti-theft.”

Five times the past year, while driving on the freeway, the first incident I cannot remember, but I do know that the other four incidents were on a slight incline. The car acted as if it wasn’t getting enough gas and slowed down and was shaking. Giving gas would not help, and it kept slowing down. The check engine light would come on and once I turned off the car and turned it back on, the car acted normal again. Sometimes I had to keep it turned off at least a minute before it would run normal again. I took it to the dealership twice and both times I was told that because the engine light was not on, they did not know what was wrong. I asked if they could check the computer to look for faults, and they said that is a waste of time because not only would I have to pay for the service,but they could guarantee that faults will not be found so it would be a waste of my money. The fact that this has happened so many times., once every a few months, and the fact that there has been similar problems on other models/years, I would like to report that I think it also has to do with my model and year. While filling out this report, it only showed that it was a 2020 Honda Accord and did not include the fact that it is a hybrid if that makes a difference. My car is a 2020 Honda Accord hybrid. Last incident was this past Saturday. August 9, 2025. This was the worst incident due to it took longer to correct itself and took three tries.

While diving at highway speeds (first at 55mph in may 2025 and then again in July 2025 at 65mph) I got a warning on screen about power loss and a critical failure and that power will be reduced and to stop at the side of the road. Within 30 seconds or a minute of the warning the car power cut out significantly impacting the speed and both times almost causing traffic behind me to hit me from behind. I took it to Honda dealership in dulles, va back in may 2025 and they told me it was the electric water pump which I had replaced. Now in July it happened again and this time I had my wife and child with me in the car as well as a guest. I had to pull over and all the warning lights started to flash (everyone of them). I have taken it back to Honda but having a car that goes from 65mph to 25mph on the highway with no warning to others is a recipe for disaster. Apparently this is a known issue with the hybrid system and the battery needs replaced (from online honda forums) which Honda is not doing unless forced. I am still waiting for my dealer to get back to me but its exactly the same problem as the other notes I saw online. My car only has 46,000 miles.

When picking up speed, the steering wheel is difficult to turn. And not working line keep Assistance. U0416 code in ecu (eps). No any errors on dashboard.

The Collision Avoidance system activated twice for no reason. Inspection is available. I and my passenger were jerked by the rapid stop & could have been rear ended if anyone was behind me. The second event was in an intersection when I and the driver behind me were driving slowly. if the car behind wasn't alert, he or she could have collided with me. No one was travelling in front of me and yet the brake suddenly engaged. The dealership rep. did not confirm the problem after driving it 5 minutes. There were no warning lamps, messages, or symptoms before the brake engaged in both instances.

The contact owns a 2020 Honda Accord. The contact received notification of NHTSA Campaign Number: 23V858000 (Fuel System, Gasoline); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. Parts distribution disconnect.

On several occasions and almost never under similar circumstances, my entire Brake System suddenly shows there is a problem and flashes warnings on my dashboard - parking brake, power steering, vehicle stability assist, hill start assist, adaptive cruise control, collision mitigation, road departure systems - each systems shows there is a problem and says “see your dealer”. The first time it happened, I was driving on the interstate, and my only way of getting to safety was pulling off the road and trying to override the brakes manually to get my car to eventually stop. I had my car towed to the nearest Honda dealership the first and second times this happened. They assured me everything was fine or they would “restart my system”. The problem still exists, and it often leaves me stranded on the side of the road, in random parking lots, or just stuck at home unable to get to work.

At speeds between 50mph a howling noise begins and gets louder as the speed increases to 55mph. The howling noise is quite loud. It stops after you get above 55pmh or you open a window. The dealer said he was not aware of this problem.

Overnight while parked in the garage, the front windshield became cracked without signs of impact. The next night before I had even had the chance to bring it in for a scheduled inspection at the dealership, the crack spidered out to cover almost 15-20% of the windshield. When I took it into for inspection at the dealership, they also mentioned that it looked like there was no impact and the crack was internal to the glass. They agreed that it looked like the same situation as described in Honda TSB 20-118, but said that it could not be covered because it wasnt in the identified VIN range even though it looked like a similar situation described in the TSB.

FREON LEAKING FROM THE EVAPORATOR.

Power system error and warning lights pop up or off no were

Without driver intervention, the vehicle engaged the brakes. Threw both passengers forward until the seat belt restraints engaged. Bruising both passengers shoulders. The vehicle would not respond to either pedal - brake or gas for a few seconds. There was no visible traffic in front of us. The day was clear. And no construction or overpasses. The vehicle was taken into a certified Honda dealer and inspected. No “flags” or diagnostic issues found. The car was driven by the dealer. The issue wouldn’t reproduce. The dealer stated that they did find a large “smashed” bug on one sensor and wondered if it could have caused the issue. Prior to the vehicle initiating the panic stop, no indications of a event were posted on any device in the vehicle

On 2 incidents, I've had the collision mitigation braking system (CMBS) issue driver warnings/alerts and automatically hit the brakes without warning when there are no obstacles in front of the vehicle and it has not deviated from its lane. Both incidents occurred during highway speeds. 1 incident was in a construction area where the car entered a steep decline and then rise as the construction was part of lane resurfacing. The 2nd incident was while driving over an overpass (not sure, but possibly a steep incline).

WHEN USE RIGHT TURN SIGNAL, AUDIO [RADIO] CUTS OUT. WE REPORTED IT TO THE DEALER IN [XXX], THEY COULD NOT DUPLICATE THE PROBLEM. INTERMITTENT PROBLEM [XXX]- USE RIGHT TURN SIGNAL, RADIO CUTS OUT. HONDA DEALER REPLACED ELECTRICAL HARNESS WHILE STILL UNDER WARRANTY [XXX] - SAME PROBLEM - USE RIGHT TURN SIGNAL, RADIO CUTS OUT. HONDA DEALER REPAIRED ELECTRICAL HARNESS - no longer under warranty. DEALER CHARGE $190 INSPECTION FEE [XXX]- SAME PROBLEM - USE RIGHT TURN SIGNAL, RADIO CUTS OUT. - no longer under warranty. DEALER CHARGE $190 INSPECTION FEE - DEALER WANTED $3212 TO REPAIR 6/13/25- CALLED AMERICAN HONDA CORP. Spoke with [XXX] 800-382-2238, Case#[XXX}. 9/15/25- After MONTHS of emails/ documentation of repair bills/ phone calls , AMERICAN HONDA CORPORATION REFUSES TO PAY FOR ENTIRE $3212 REPAIR BILL. TOLD US TO PAY $1000 TOWARDS THIS REPEATED ELECTRICAL PROBLEM. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I was driving yesterday accordingly to the speed limit on a main city street. There were no cars in front of me AT ALL when all of a sudden my car hit the breaks 3 times back to back out of nowhere causing my car to swerve! I felt completely out of control of my vehicle and I am so thankful I wasn't on the highway and that no one was near me! I first noticed issues with the breaking system, previously on 3 other occasions throughout my time of owning/leasing the vehicle. 3 other occasions before receiving an alert on the screen that read "the brake system has a problem. Avoid high speeds and sudden braking. Have your vehicle checked by a dealer immediately." That was February 13, 2022. I called immediately to take my car in and was told I would have to pay out of pocket to have this issue addressed which seems outrageous to me since it is something that I have no control over. So without the ability to pay such a high fee for a vehicle that I thought would keep me safe, I took it to a local auto shop and had my brakes checked while I had my routine maintenance done. I was told everything was fine, which in my opinion indicates it is at fault of the manufacturers.. I don't want to die before something is done. There have been many claims about the same thing happening. I'm truly shocked there hasn't been a recall due to this issue.

My car is a hybrid. At times, a Very loud humming noise is produced, due to glitch in software with the ANC. Noise starts and stops suddenly, intermittently, without warning, and is a safety hazard. Noise can build to be extremely loud and jarring, and can last for several minutes. Honda claims this is a cosmetic issue only and they are working on it. But the issue has been repeatedly reported by thousands of drivers over a multi-year period. Honda is ignoring any real resolution. Please help! This is frightening and disruptive, and makes operating the car unsafe. Thank you. It started about 1 year after ownership and was occasional. IT is now happening multiple times, every time I drive my car.

This seems to carry over from problems with prior year models. I can be on the highway with no vehicle in front of me and the brakes apply by themselves (foot not even near the brake pedal). It is a brief braking, but it can be dangerous when someone decides to ride on my tail. I notice it does happen when I'm going around a curve and a railing next to me on the outside of the curve is near the lane. It also happens at times when a vehicle is in the next lane (right or left) and slightly ahead of me, even on a straight-a-way. It has happened multiple times. Date below is just the latest. I approximate my speed at 65MPH and my car low mileage.

I have had two (2) separate incidents of the automatic emergency braking system engaging suddenly & without reason as I was driving. Once on a residential street & the second on the freeway at approx. 65 mph. The AEBS released very quickly each time, but is a highly and potentially dangerous thing to happen. There are numerous reports & complaints about this in the 2016-2019 Honda Accords, but it is now happening in the 2020 year cars.

The contact's client owns a 2020 Honda Accord. The contact stated that while his client was driving at about 45 MPH, the vehicle inadvertently accelerated on his own, drove off the road and drove down in a steep embankment, hit 8-9 fence posts, ramped up over the driveway of the embankment, and crashed into a tree. The contact did not know whether the air bags deployed. The contact's client sustained severe injuries including broken bones. The contact's little brother who was in a forward-facing child seat in the rear driver's side seat was pronounced dead at the scene. A police report was filed. The contact's client and her brother were transported to the hospital by emergency services. The vehicle was towed to a garage where it was totaled. The dealer and manufacturer were not notified of the failure. The failure mileage was unknown.

I was on the Freeway ramp from I11N to I215 in Henderson, NV. I tapped off the interactive cruise control because my exit was Gibson - immediately after the ramp. Within a few seconds, the car braked heavily on its own, no dash warnings, and almost caused me to get rear ended. I pushed on the brake and then the gas and it stopped the car from braking on its own.

While driving at highway speeds (50 -55mph), the ANC (active noise control) unit delivers a loud Booming sound through the speaker system. The sudden and unexpected booming noise startled the driver causing temporary loss of control of the vehicle. The solution has already been identified in a Service Bulletin from Honda as Service Bulletin 21-053. The ANC unit has incorrect software and requires replacement to fix and eliminate the safety hazard. The issue was noted June 29th, 2021; but, has not been escalated as a Safety Recall. I have replaced the ANC as directed by the Service Bulletin and it has resolved the problem; however, other Honda vehicles have this same safety issue and if not Recalled will continue to be a safety concern for all drivers on our highway. I would like to see this escalated to a Safety Recall level and customers notified to replace. I am disappointed that Honda has not proactively Recalled this.

My car died as we pulled into traffic. Honda said the fuel pump failed. It took months to get the fuel pump replaced. Honda said that my vin # wasn't included in a recall.

TL* THE CONTACT OWNS A 2020 HONDA ACCORD. THE CONTACT STATED WHILE DRIVING 55 MPH, SHE HEARD AN ABNORMAL NOISE INSIDE THE VEHICLE. THE CONTACT STATED NO WARNING LIGHT WAS ILLUMINATED. THE VEHICLE WAS TAKEN TO RAIRDON'S HONDA OF SUMNER (6302 AUTO LN, SUMNER, WA 98390, (253)826-6800) WHERE IT WAS DIAGNOSED WITH NEEDING THE ACTIVE NOISE CANCELLATION (ANC) SYSTEM TO BE REPLACED. THE VEHICLE HAD NOT BEEN REPAIRED AS OF YET. THE MANUFACTURER INFORMED THE CONTACT THAT THEY WERE AWARE OF THE FAILURE WITH THE ACTIVE NOISE CANCELLATION (ANC) SYSTEM AND WERE WORKING ON A REMEDY. THE FAILURE MILEAGE WAS APPROXIMATELY 760.

WHEN TRAVELING 52 MPH MY CAR MAKES A VERY LOUD DRONING SOUND. MY DEALERSHIP HAS CONFIRMED THE NOISE AND BELIEVE IT TO BE AN ACTIVE NOISE CONTROL PROBLEM. THEY REPLACED THE MICS AND MODULE WERE REPLACED WITHOUT RESOLUTION. HONDA ENGINEERING ADVISED TO REPLACE WITH A PART FOR A 2021 MODEL YEAR. AFTER BEING IN THE SHOP FOR 2 MONTHS THE PART WAS REPLACED WITHOUT RESOLUTION. HONDA ENGINEERING ADVISED THE DEALER TO DISCONNECT THE UNIT AND RETURN THE CAR TO ME WHILE THEY RESEARCHED. THERE STILL ISN'T RESOLUTION.

WHILE ON MOTION ON A STATE HIGHWAY MINOR DEBRIS FROM THE ROADWAY THAT HITS THE WINDSHIELD OFTEN CREATES SMALL NICKS ON THE WINDSHIELD THAT COLLECTIVELY IMPAIR VISIBILITY. IT APPEARS THAT THERE IS AN EXCESSIVE AMOUNT OF WINDOW NICKS AND CHIPS.

VEHICLE HAS OPEN RECALL. DEALERSHIP STATES THAT NO UPDATE IS SHOWING NEEDED ON COMPUTER. CONTACTED HONDA AND DEALER SENT PAPERWORK STATING THAT NO UPDATE TO BE PERFORMED TO HAVE RECALL REMOVED FROM VIN. RECALL STILL HAS NOT BEEN REMOVED. FIRST WENT TO DEALERSHIP TOWARDS THE END OF DECEMBER 2020.

THIS VEHICLE WHEN DRIVING AT NORMAL SPEEDS TENDS TO MAKE A HIGH ACCELERATING NOTICES, IT MAKES A PERSON FEEL AS IF SOME OTHER VEHICLE WAS PASSING ON THE LEFT SIDE AT A VERY HIGH SPEED. THE FIRST TIME I HEARD THIS NOISE, I MOVED TO THE RIGHT SIDE OF THE ROAD, THINKING THAT A SPEEDING DRIVER WAS PASSING ME. SINCE THEN, THE VEHICLE CONTINUES TO MAKE THIS ACCELERATING NOISE, SIX TO SEVEN TIMES ON A AVERAGE OF A THIRTY MILE TRIP. I FEET THAT THIS IS NOT NORMAL FOR A VEHICLE THAT IS LESS THAN A YEAR OLD. THE VEHICLE MAKES THIS NOISE WHEN IN MOTION FROM 20-50 MILES PER HOUR, AND MIGHT ALSO MAKE IT AT HIGHER SPEEDS. IT NEVER MAKES IT WHILE SITTING IN PLACE IDLING.

NEW CAR, LESS THAN 2000 MILES. ALL OF A SUDDEN LOUD NOISE IS COMING OUT OF THE SPEAKERS, SOMETHING LIKE AN AUDIO AMPLIFIER NOISE UNDER LOAD, BUT VERY LOUD. HAPPENS RANDOMLY, CAN BE REALLY DISTRACTING.

1. THE APPLE CAR PLAY FREEZES WITH THE ORIGINAL APPLE LIGHTNING CABLE 2. THE DRIVER'S DOOR CLOSES WORSE THAN THE PASSENGER DOOR. I HAVE TO PUSH THE DRIVER'S DOOR MUCH HARDER TO CLOSE IT. 3. THE ISSUE WITH THE AIR CONDITIONER. I'M USING AUTO 72 DEGREES AND DON'T LIKE TO PLAY WITH THE AC. 30-40 MINUTES AFTER WARMING UP THE CAR, THE AIR FROM THE LEFT AND RIGHT FRONT GRILLES BEGINS TO BLOW WITH COLD AIR, I FEEL COLD AIR ON MY KNEES. IF I MANUALLY CHANGE THE DIRECTION OF THE AIR ONLY TO THE FACE, THEN THE AIR IS BLOWING WARM. IF I RETURN THE AIR CONDITIONER TO AUTOMATIC MODE, I FEEL COLD AIR AGAIN FROM THE LEFT AND RIGHT FRONT GIRLS. 4. STILL HEAR LONG LOUD HUMMING SOUND WHILE DRIVING ON HIGHWAY 53 MPH FROM THE FRONT DOORS SPEAKERS I ASSUME, AND SHORT LOUD HUMMING SOUND WHILE DRIVING IN CITY AROUND 28-29 MPH. I SUPPOSE THE ACTIVE NOISE CANCELLATION SYSTEM WORKING NOT PROPERLY.

LOUD BUZZING NOISE RANDOMLY. I THINK ITS AN ISSUE WITH THE ACTIVE NOISE CANCELATION SYSTEM. IT'S LOUD, RANDOM AND FREQUENT. NOTICED IT AS SOON AS I GOT THE VEHICLE. HAVE FOUND FORUMS WHERE THIS IS A COMMON ISSUE.

LONG LOUD HUMMING SOUND WHILE DRIVING 53 MPH (BELOW 40 F DEGREE) AND SHORT LOUD HUMMING SOUND WHILE DRIVING AROUND 38 MPH. ACTIVE NOISE CANCELLATION SYSTEM WORKING NOT PROPERLY. A LOT OF HONDA OWNERS HAVE THE SAME ISSUE FROM 2018! HTTPS://WWW.CARGURUS.COM/CARS/DISCUSSION-T75510_DS980301 HTTPS://YOUTU.BE/AMWAUSHXPB4 HTTPS://YOUTU.BE/O1Q9FJUERLM

THE PAINT IS DEFECTIVE , THE CLEAR COAT IS PEELING OFF A LOT OF SCRATCHES ALL OVER THE BODY OF THE VEHICLE IN MANY PLACES .THE IS 2020 AND HAS LESS THAN 1400 MILES.ABOUT 6 MONTHS OLD GARAGE KEPT .

TL* THE CONTACT OWNS A 2020 HONDA ACCORD HYBRID. THE CONTACT STATED WHILE DRIVING 55 MPH, THE CONTACT STATED THAT AN ACOUSTICALLY DRIVEN DRONE SOUND WAS COMING FROM FRONT DRIVER'S SIDE OF THE VEHICLE. THE CONTACT STATED THAT THE SOUND BECAME LOUD ENOUGH PREVENTING COMMUNICATION BETWEEN THE VEHICLE PASSENGERS. THE VEHICLE WAS TAKEN TO CMA'S VALLEY HONDA (296 LEE JACKSON HWY, STAUNTON, VA 24401, (540) 213-9000) HOWEVER, THE VEHICLE WAS NOT DIAGNOSED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS INFORMED OF FAILURE. THE CONTACT HAD NOT YET RECEIVED A RESPONSE FROM THE MANUFACTURER. THE FAILURE MILEAGE WAS APPROXIMATELY 8,000.

CAR WITH LESS THAN 8000 MILES HAD COMPLETE FAILURE OF BRAKES GOING THROUGH A STOP SIGN ON A CITY STREET (25 MILES AN HOUR) AND CAUSED A CRASH THAT TOTALED THE CAR. SHORTLY BEFORE THE CRASH THE BRAKES SEEMED HARDER TO STOP AT PREVIOUS STOP BUT STILL WORKED.

FROM BEING STOPPED AT A STOP LIGHT, I THEN PROCEEDED THROUGH THE INTERSECTION ONCE THE LIGHT TURNED GREEN. THERE WAS A STEEL CONSTRUCTION ROAD PLATE ON THE ROAD JUST BEYOND THE FAR SIDE OF THE INTERSECTION AND AS I APPROACHED IT AT APPROX 25MPH, THE EMERGENCY BRAKING WARNING SIGNAL ON THE DASH CAME ON AND THE CAR AUTONOMOUSLY BRAKED HEAVILY TO A STOP JUST BEFORE THE ROAD PLATE. THERE WERE NO CARS OR OBJECTS IN FRONT OF ME OTHER THAN THE STEEL ROAD PLATE. THIS HEAVY BRAKING RESULTED IN MY VEHICLE BEING REAR ENDED BY AN SUV. FORTUNATELY NO ONE WAS HURT.

TL* THE CONTACT OWNS A 2020 HONDA ACCORD. THE CONTACT STATED WHILE DRIVING 53 MPH, THE ACCELERATOR PEDAL WAS DEPRESSED AND AN ABNORMAL SOUND WAS COMING FROM THE SPEAKERS. THE CONTACT STATED THAT THE ABNORMAL SOUND INTERFERED WITH HIS ABILITY TO OPERATE THE VEHICLE. THE VEHICLE WAS TAKEN TO FOX HONDA (3050 BROADMOOR AVE SE, GRAND RAPIDS, MI 49512, (616) 956-0000) WHO INFORMED THE CONTACT THAT THEY WERE UNABLE TO ASSIST HIM. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER HAD BEEN INFORMED OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 200.

THIS VEHICLE WOULD MAKE UNCOMFORTABLE NOISE AT A SPEED OF ROUGHLY 55 MPH. WHEN I WAS TRAVELING ON HIGHWAY AND CRUISE AT AROUND 55 MPH, THERE WAS A CHANCE THAT I CAN HEAR A NOISE BUILDING UP. THIS NOISE FELT LIKE ENGINE SPINNING AT 2000-3000 RPMS BUT I COULDN'T DETERMINE WHAT EXACTLY IT WAS. I AM SAYING 'BUILDING UP' BECAUSE THIS NOISE WOULD BECOME LOUDER AND LOUDER WITHIN THE NEXT FEW SECONDS, TO A LEVEL THAT MADE ME AND PASSENGER UNCOMFORTABLE. THEN I WOULD EITHER DECELERATE OR ACCELERATE A BIT AND THE NOISE JUST WENT AWAY ABRUPTLY. IT DIDN'T HAPPEN EVERY TIME WHEN I WAS AT 55 MPH, BUT IN MY RECENT 500 MILES I HAVE ENCOUNTERED 4 CASES, WHICH MADE ME FINALLY CONFIRM THAT THE NOISE WAS MADE BUS THE VEHICLE, NOT THE ROAD OR OTHER VEHICLES. I REMEMBER IN EVERY CASE OF ISSUE, I WAS PRESSING THE GAS PEDAL LIGHTLY TO MAINTAIN THE SPEED. *TR

A loud booming / vibrating noise from the speakers while traveling between 52 & 54 mph with windows closed. Sound starts as a low noise / vibration and escalates to its maximum before abruptly ceasing. Noise / Vibration first noticed when taking car home after initial delivery 3/28/2020. Vehicle use was minimal (due to COVID shutdowns) and noise not noticed again until late fall / early winter of 2020. Vehicle was taken to dealer at regular service interval in February 2021 and problem was evaluated at that time. Vehicle has been evaluated once and microphone for Noice Cancelling system replaced. Issue subsequently returned. Vehicle going for second repair.