Honda Civic collision warning problems

Filed Oct 26, 2026 · Acceleration, Electrical · MA

While traveling on the highway at approximately 55–60 mph, my vehicle suddenly began shaking and progressively losing engine power and speed. The check-engine light started flashing rapidly, followed by multiple dashboard warnings involving the braking system, power steering, vehicle stability control, collision mitigation, and other safety systems. Despite pressing the accelerator, the vehicle continued losing power and slowing down. The engine remained running, but the vehicle could not maintain highway speed.

Filed Sep 20, 2026 · Electrical, Steering · CA

On September 17, 2026 at approximately 8:00 a.m. I was driving my 2021 Honda civic Lx with my children in the vehicle when multiple warning lights and system malfunction messages suddenly appeared on the dash board. The vehicle appeared to experience an electrical malfunction/ reset while still driving and I suddenly lost normal power- steering assistance. The steering wheel became extremely difficult to turn and control while the vehicle was moving.I was able to call for assistance and when jumper cables were hooked on to battery underneath the vehicles hood the vehicle engine was able to restart, then was able to get the vehicle home without a collision or injury. The sudden loss of steering assistance created a serious safety risk to me, my children and others on the road. I photographed multiple warnings displayed on the dash panel, including Electric Parking break problem and collision mitigation system problem. This vehicle has a documented history of electrical/ mechanical concerns and prior repairs, including battery and alternator replacement. The exact cause of this most recent failure is currently UNKNOWN. American Honda motor co. has also opened a case #16640343 regarding this incident. I am reporting this to the federal safety agency due to the sudden loss of power- steering assistance occured while the vehicle was actively being driven and could have resulted in a collision.

Filed Apr 8, 2026 · Driver assistance · WI

This vehicle suffers from phantom braking. With the adaptive cruise control set, at times, in the display of the instrument cluster, the display shows a semi, motorcycle or car that is not there in real life. When this happens the car applies the brakes and starts slowing down. Sometimes this is bad enough that the collision warning message comes on and the brake application is very aggressive. The type of weather or road surface does not seem to matter. It seems to be very random. This happens once a week. Not just on the date provided below.

Filed Mar 20, 2026 · Driver assistance · 6,555 miles · FL

The contact owns a 2025 Honda Civic. The contact stated while driving approximately 64 MPH, the Forward Collision Avoidance system unintendedly activated without a person or a vehicle nearby. No warning lights were illuminated. The failure reoccurred on several occasions. The vehicle was taken to a dealer to be diagnosed; however, the cause of the failure was undetermined. The vehicle was not repaired. The vehicle was taken back to the dealer to be diagnosed; however, the cause of the failure was not yet determined. The vehicle was not repaired. The contact researched and was made aware of a Class Action Lawsuit associated with the failure. The manufacturer was notified of the failure. The failure mileage was approximately 6,555.

Filed Feb 22, 2026 · Brakes, Driver assistance · TX

I was driving my 2026 Honda civic in the early morning hours before sunrise traveling the speed limit of 75 mph on a rural highway in North Texas. Out of nowhere, my vehicle activated the collision mitigation system bringing me to a complete stop in the middle of the highway. I verified that no hazards were present and the system activated on its own. Thankfully no other vehicles were around which could have negatively impacted them.

Filed Jan 15, 2026 · Acceleration, Brakes · AZ

“Collision mitigation system problem see dealer” warning! Once at unknown mileage around 6,000 and once at around 10,000 miles. Random vehicle braking around 6-8 times in 12,000 miles with no reason. Braking happens while in cruise control. Both times that the warning messages appeared it was along with warnings for adaptive cruise control, automatic braking, lane departure, lane keep assisting. Many warnings all flashed consecutively with the final warning about collision mitigation system problem see dealer.

Filed Jan 8, 2026 · Driver assistance, Electrical · CA

I am reporting repeated electronic safety system malfunctions in my 2023 Honda Civic Sport sedan that occurred while driving at highway speeds and present a serious safety concern. In June 2025, while driving at highway speed, multiple warning lights and messages suddenly appeared, including: Brake System Warning, Road Departure Mitigation System Warning, Parking Brake/Brake Hold Warning, and Adaptive Cruise Control Warning. These warnings appeared simultaneously without prior notice, raising concern about whether the braking and safety systems were functioning properly while the vehicle was in motion. I took the vehicle to a Honda dealership for diagnosis. The dealer did not identify a specific electronic or mechanical defect and instead claimed the issue was caused by liquid spilled near the electronic parking brake switch. I was told the repair was not covered under warranty and paid approximately $600 out of pocket. No evidence was provided explaining how this would cause failures across multiple safety systems. In January 2026, the same group of warning lights appeared again under similar conditions while driving at highway speed. This recurrence strongly suggests the issue was not caused by driver error but may be related to an intermittent electronic, sensor, or control system defect. I have a scheduled dealer appointment tomorrow to address this second occurrence of electronic malfunctioning. Because these warnings involve critical braking and collision mitigation systems and occurred while the vehicle was in motion, they present a potential safety risk. I am submitting this complaint so the federal safety agency can document and evaluate whether this represents a broader safety defect.

Filed Dec 16, 2025 · Driver assistance · WI

The collision mitigation braking system consistently detects objects in the road and forcibly brakes when the road ahead of me is completely empty. This has happened 4 or 5 times just in the last year. The first time it happened I was driving on a completely empty road when the CMBS activated and kept slamming on the brakes until I pulled over and restarted the entire car. I don't always have to restart the car every time, but if it ever happens on a busy road it will cause an accident. The dealership refuses to inspect the system or try to recreate the problem despite the fact that there was a class-action suit against Honda for this exact CMBS malfunction in several other models. They just tell me to manually turn it off every time I get in the car. I am human and sometimes I forget, so this is not a solution. I'm afraid that this buggy "safety" system is going to get me and my child killed one of these days. I am happy to have the system inspected, but it doesn't keep a log of every time it activates so there's no real way to verify the false positives, and it happens randomly so it's very hard to recreate.

Filed Dec 1, 2025 · Fuel system, Transmission · MD

On November 5, 2025 a few dash errors came on, they were: 1. Brake hold system problem 2. Vehicle stability assist problem 3. Emission system problem 4. Road departure mitigation system problem 5. Collision mitigation system problem 6. Lane keeping assist system problem 7. Adaptive cruise system problem 8. Hill start assist system problem 9. Tire pressure monitor system problem I called the dealership on 11/5/25 and made a service appointment for 11/6/25. The dealership looked over the car and stated that the code the car was throwing was "Low Fuel Pressure". The dealership stated that they do not know why the code was present as the car showed signs of issues, they cleared the code and released the car back to me on 11/6/25. On 11/24/25 while driving on a major highway the car stalled about 8-10 times. I contacted the dealership and went right into the dealer on 11/24/25. The dealership kept my car and issued a loaner vehicle to me. On 11/25/25 I received a call from the dealership stating that the high pressure fuel pump would need to be replaced. The fuel pump was replaced on 11/26/25 and the service manager called me stating that they would keep the car to test drive and monitor it for further issues. On 11/28/25 I received a call from the service advisor stating that upon further checking the car they have located a transmission leak and found large chunks of metal in the transmission. The service advisor stated they would reach out to Honda and get the recommendations on fixing the problem. On 12/1/25 the service advisor reached out to me and stated that Honda recommended they clean the leak and release the car back to me. The service advisor stated that they were not happy with this outcome and then reached out to their district representative, the district representative recommended that they clean the leak, test drive the car for about 20-30 miles and send photos of the chunks of metal in the transmission. I am now waiting to hear back.

Filed Nov 10, 2025 · Electrical · 300 miles · NC

The contact owns a 2026 Honda Civic. The contact stated that while driving at various speeds, the vehicle would not independently stop as intended or detect other nearby vehicles. A message "System Not working - See Dealer" was displayed. The vehicle was taken to a local dealer, where it was diagnosed; however, the cause of the failure was not identified. The vehicle was taken to another local dealer, Honda of Indian Trail (4918 W Hwy 74Indian Trail, NC 28079) for a second opinion, where it was determined that the Collision Mitigation Braking System had failed. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 300.