2019 Honda Accord: misfire or rough idle

Filed Nov 3, 2026 · Engine · 77,689 miles · CA

The contact owns a 2019 Honda Accord. The contact stated that while driving at an undisclosed speed, the “Service Engine” warning light illuminated and the vehicle was hesitating and shaking abnormally. The contact used a diagnostic scanner to retrieve DTC for engine misfire in cylinders #2 and #3. The manufacturer was notified of the failure. The vehicle was taken to a dealer where it was diagnosed with coolant intrusion into the cylinders caused by the cylinder head gasket failure. The vehicle was repaired. The failure mileage was 77,689.

Filed Sep 14, 2026 · Engine · TX

Car shit down on me. Ran OBD report and threw a misfire cylinder 4 P0304. Head gasket has to be replaced.

Filed Sep 11, 2026 · Driver assistance, Electrical · FL

The vehicle keeps going into limp mode and misfire on cylinder 2 and 3 and all dashboard lights are coming on. I had my spark plugs changed and my coils

Filed Sep 4, 2026 · TX

I am filing this complaint regarding my 2019 Honda Accord equipped with the 1.5L turbocharged engine. The vehicle currently has approximately 190,000 miles. My vehicle has developed a serious engine/drivability problem accompanied by multiple warning lights. The warning lights that have appeared include the Check Engine light, VSA/Traction Control warning, Brake warning, Steering warning, Adaptive Cruise Control (ACC) warning, and Road Departure warning. The diagnostic trouble codes found on the vehicle are: P0300 – Random/Multiple Cylinder Misfire P0302 – Cylinder #2 Misfire P0303 – Cylinder #3 Misfire P219A – Air-Fuel Ratio Variation P0420 – Catalyst System Efficiency Below Threshold I took the vehicle to a Honda dealership for diagnosis. After inspecting the vehicle, the dealership told me that I need a turbocharger. I have never previously replaced the turbocharger on this vehicle. I am concerned that a major turbocharger/engine-related failure on a vehicle equipped with the 1.5L turbo engine, combined with multiple cylinder misfires and an air-fuel ratio variation, could create a significant safety hazard. My concern is not simply the cost of repairing the vehicle. I am concerned about what could happen if the engine suddenly loses power, hesitates, misfires severely, or fails to accelerate while I am driving in traffic or attempting to merge onto a highway. The multiple warning lights are also concerning. When the problem occurs, the vehicle displays warnings involving several systems, including traction control, braking, steering, ACC, and Road Departure. This creates concern that safety and driver-assistance features may be disabled or affected at the same time as the engine problem. The vehicle has approximately 190,000 miles, but I believe mileage alone should not dismiss a potentially recurring safety-related defect, particularly when the vehicle is experiencing multiple engine-related diagnostic codes and the dealership has diagnosed a turbocharg

Filed Aug 31, 2026 · CA

Head gasket needed to be replaced. Coolant leaking into cylinders, sudden loss of motive power / engine misfires while driving. Driving on the highway, and trying to accelerate, there is a hesitation and vibration and also when letting off the gas.

Filed Aug 16, 2026 · Engine · GA

Coolant is leaking into my cylinders due to the head gasket design flaw. Engine now needs to be replaced and it’s over $6,000. My car has about 150k miles. About 18 months ago it started misfiring, even while on the highway multiple times with my children. Codes came back saying i needed to replace ignition coils and spark plugs. Did that over and over and over. Turns out this is an on going issue with this specific year and model. I bought this car with 4 miles on it. I’m left without a car. This need to be recalled. I have read over 4,000 stories of others having the same issue.

Filed Aug 11, 2026 · Electrical, Engine · SC

All lights comes on. Car shuts down, and electrical misfire

Filed Aug 5, 2026 · Engine, Fuel system · MI

I was driving on the highway in Michigan, the speed limit is 70 mph. All of a sudden, I noticed that my car acceleration was not working. It ended up my engine misfired and in doing so, I could not go more than 20 mph on the actual highway!!! it was absolutely terrifying, even when I put on my emergency lights, I had to find a place to safely pull aside. I still had to pull out in front of someone to try to get off the exit, so pulling out in front of someone at 20 mph on the highway was petrifying. Once, I finally was able to pull into a safe place. I immediately called my insurance company and Honda about the misfiring of my engine. My car was then towed to a Honda dealership, where technicians diagnosed a blown head gasket caused by coolant leaking into a cylinder. The only warning light was the “check engine” flashing light when I was unable to drive more than 20 mph. My vehicle went limp. The repair required replacement of the head gasket at significant personal expense About $6k +.

Filed Aug 4, 2026 · Electrical, Engine · 120,000 miles · NY

The contact owns a 2019 Honda Accord. The contact stated that while driving at an undisclosed speed, the vehicle stalled with several unknown warning lights illuminated. The contact scanned the vehicle and retrieved a fault code associated with the high-pressure fuel pump failure. The vehicle was towed to dealer to be diagnosed. The dealer diagnosed the vehicle with misfires in cylinders #1 and #4 and spark plug failures. The vehicle was repaired and test driven. The manufacturer was made aware of the failure. The failure mileage was approximately 120,000.

Filed Jul 11, 2026 · Engine · MD

I am reporting a premature and dangerous failure of the engine head gasket on my 2019 Honda Accord Sport (1.5L Turbo engine, 68,220 miles). While driving, the vehicle suddenly lost power due to severe engine misfires. Simultaneously, the dashboard experienced a total cascade of safety system failures, illuminating warning lights for the Check Engine Light, Electric Parking Brake, Traction Control (VSA), Road Departure Mitigation, and Adaptive Cruise Control. The vehicle currently in the authorized honda dealer where technicians officially diagnosed a blown head gasket leaking coolant into Cylinder 3. This is a widespread, well-documented manufacturing defect with Honda's 1.5L Turbo engines. I request that the federal safety agency launch a formal safety investigation into American Honda for these premature head gasket failures to force a mandatory safety recall.

Filed Jun 24, 2026 · Airbags, Electrical · CA

My Honda accord keeps trying to turn off in the middle of the fwy and I know it’s due to the fuel pump, I have a misfire and all the warning lights came on. This is due to Honda having the fuel pump recalled that has damaged all the fuel injectors. It took them almost a year to get the recall parts and now myself and a ton of others are now having to pay for these fuel injectors to have a car that doesn't stall and die on the road. Honda should have taken care of this knowing it damaged the fuel injectors.also issue with air bad supplemental issues

Filed Jun 24, 2026 · Engine, Transmission · CA

Vehicle: 2019 Honda Accord Sport 1.5L VIN: [XXX] Mileage: Approximately 122,497 My vehicle experienced a cylinder head gasket failure accompanied by coolant intrusion into the engine cylinders, injector-related issues, fuel trim failures, and cylinder misfires as diagnosed by an authorized Honda dealership. Prior to diagnosis, the vehicle experienced engine performance concerns associated with the misfire condition. The dealership documented historical misfire events and coolant intrusion into the combustion chambers. I am submitting this complaint because I am concerned that injector-related issues, engine misfires, coolant intrusion, and cylinder head gasket failures may represent a recurring condition affecting similarly equipped vehicles. Engine misfires and coolant intrusion can potentially result in reduced engine performance, loss of power, unexpected vehicle behavior, or engine failure while the vehicle is being operated. I request that the federal safety agency review this issue and determine whether a broader investigation is warranted. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)