2020 Honda Accord: misfire or rough idle

Filed Jul 30, 2026 · Driver assistance, Fuel system · NJ

The car keeps giving me misfires

Filed Jul 20, 2026 · Engine · CA

While driving, my vehicle experienced a sudden engine malfunction consistent with a failed head gasket. The engine began misfiring, shaking, and losing power, and the check engine light began flashing. The vehicle became unsafe to operate. The failed component is the engine head gasket, and the vehicle is available for inspection upon request. The sudden loss of engine performance created a serious safety concern. I was driving on a public roadway when the engine began misfiring and losing power, making it difficult to safely maintain speed and operate the vehicle. A sudden loss of power while driving increases the risk of being rear-ended or becoming involved in a collision, particularly in traffic, while merging, or at highway speeds. The vehicle was inspected and diagnosed by an authorized Honda dealership, which confirmed the head gasket failure. I also spoke with independent mechanics who were immediately familiar with this type of failure on Honda's 1.5L turbocharged engines. Although Honda diagnosed the problem, my request for goodwill assistance was denied because the vehicle was outside the warranty period. The vehicle has been inspected by Honda and is available for further inspection if requested. It has not been inspected by law enforcement or my insurance company because no accident occurred. As the condition progressed, the engine developed a rough idle and intermittent misfires. Eventually, the check engine light began flashing, and the engine began shaking and losing power while I was driving. These warning signs escalated into a condition that I believe presented a significant safety risk. I am submitting this complaint because an engine that suddenly loses power while being driven poses a serious safety hazard to both the driver and others on the road. I respectfully request that the federal safety agency investigate whether this represents a recurring safety-related issue affecting Honda vehicles equipped with the 1.5L turbocharged engine.

Filed Jul 15, 2026 · Fuel system · CA

I am the original owner of a 2020 Honda Accord 1.5 Turbo. The vehicle has developed a check engine light, rough engine operation with misfires, and reduced fuel economy at Mileage: 72,207. The vehicle was diagnosed at Honda of Reseda with failed fuel injectors. American Honda reviewed the matter under Case #16435337 and offered a one-time goodwill accommodation that would require an out-of-pocket payment of $1,058.58 plus applicable fees and taxes. I respectfully declined the offer because fuel injector failures causing these exact symptoms appear to be a known and recurring issue on many 2018–2022 Honda Accord 1.5 Turbo models, often occurring at relatively low mileage. Honda has issued technical communications regarding injector-related diagnostic trouble codes (such as P030x and P0172) on these vehicles. I am filing this complaint to document the defect and request a thorough investigation so that a proper recall or comprehensive remedy can be implemented for all affected owners.

Filed May 6, 2026 · Acceleration, Electrical · SC

All lights on dash are on. Problem with running hot, oil is milky looking misfires, vibration is terrible. Cuts off and will not go over 5 mph sometimes.

Filed Mar 10, 2026 · Transmission · CT

2020 Honda Accord Sport 1.5. Routine maintenance always done on time. At 108K turn my car on after a routine 45 minute drive an hour or so previous and all warning lights come on. TPMS, Brake System Problem, road dept system, emissions system. Dealer reports Head Gasket needs replaced and 3rd cylinder misfire, coolant leak etc. Quoted $5K to repair. Only 108K miles. Honda isn’t what it used to be. Quick search reveals the 10th Gen accords and civics suffer from early failure of this product routinely. Surely a known defect worthy of recall.

Filed Feb 27, 2026 · Fuel system · FL

I replaced my fuel injectors which seems to be a ginormous problem with these 1.5l engines. This was unfortunately only the start of my issues. My current issue is after replacing the fuel injectors my car was still hesitant when accelerating(jerking), stalling, rough idling and my only answer from anyone is my fuel pump/filter. Reading through these forums I am seeing this being another ginormous issue with this model. It’s a shame and so mind blowing Honda has not done anything about either issue. Stay safe my 1.5ers!!!

Filed Jan 13, 2026 · Electrical, Engine · MS

I have constantly had to replace spark plugs within the last year — all lights are on dashboard. Finally took it and got a P0372 code, rough idling and misfiring, and stalling. Car once cut off on me while driving. Took it to the Honda dealership and it is indeed my fuel injectors and gasket. I have tried to get in touch about a possible recall but the Honda Manufacturer are failing to release a recall. With all lights on dashboard, NO features of the car can be used (cruise control, road departure, lane keep assist, collision mitigation, hill start assist, traction control, brake hold, and tpms) I’m looking forward to a recall coming as soon as possible. I have done my research and thousands of people are having the SAME issue, it is frustrating especially with the cost of work having to be done. Nobody should have to purchase a new car because of a defect of the manufacturer or too lazy to investigate the issue. HONDA Salesmen and mechanics all say the same thing about the 1.5L Sports model. Over 3,400 worth of work due to a problem I did not cause.

Filed Aug 21, 2025 · Brakes, Electrical · MD

Electrical drain in system causing premature battery failure and electrical misfiring that causes the car to shut off and flashing a brake warning message to contact dealer and once this occurs car won’t start until Honda link and hands free pairing are reconnected. Issue is if the misfiring drains the battery, driver is not able to reconnect the cars apps and pair the Bluetooth, therefore, car is not will be immobile until battery is recharged.

Filed Jul 24, 2025 · Fuel system · IL

Car is giving a P0301 error. Replaced coils and spark plugs still giving error. The problem is fuel inejectors. Gives car a rough idle at start up.

Filed Jul 22, 2025 · Electrical, Engine · OH

Malfunctioning fuel injectors causing misfires stem from a known issue with faulty fuel injectors; a problem widely reported across multiple Honda models equipped with the 1.5-liter turbocharged direct injection engine. Notably, the Honda CR-V (2019–2023), Civic (2019–2022), and Accord (2018–2022) have all been consistently linked to fuel injector failures. The most serious safety concern associated with this defect is the potential for sudden throttle changes, which can trigger the check engine light, cause the engine to lose drive power, hesitate, or even stall—all of which significantly increase the risk of a crash or injury.

Filed Apr 22, 2025 · Engine · VA

Car reached 113,000 miles and started having misfires in cylinders 1&2. After being told it needed new coil packs and spark plugs, and replacing those it is still misfiring. Paid for diagnostic again and was told cylinder 1&2 were wet and most likely it was the head gasket failing.

Filed Jun 23, 2021 · Engine · 13,762 miles · NC

The contact owns a 2020 Honda Accord. The contact stated while driving 70 mph while attempting to pass another vehicle, the check engine warning light was illuminated and the vehicle went into limp mode. The contact was able to exit the highway and park safely. The vehicle was not drivable. The contact towed the vehicle to the local dealer where it was diagnosed with a misfire on cylinders 1 and 4. The local dealer reset the code. The vehicle was repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 13,762.