2018 Honda Accord: hesitation when accelerating

Filed Oct 7, 2026 · Electrical, Engine · NJ

The car hesitates upon acceleration and when it “misses” enough it will flash the engine on the dashboard, and not allow any further acceleration, going into “limp mode”. All the safety controls error on the message center and dashboard warnings all come on, even though it’s only the acceleration/transmission that’s affected. Not sure if it’s fuel injectors or a computer issue, but it’s absolutely dangerous upon entering a highway and hoping to not have system failures, that result in limp mode. I’ve been carrying a 10 mm socket for disconnecting the battery and rebooting the system, when needed. It only helps for a short while.

Filed Aug 24, 2026 · Engine · OH

I am reporting a suspected head gasket/engine defect involving my 2018 Honda Accord Sport. My vehicle experienced multiple engine-related problems before ultimately requiring head gasket replacement and cylinder head repair. On July 27, 2024, at approximately 161,480 miles, the turbocharger was replaced. In September 2025, at 207,539 miles, my vehicle was serviced at Joe Morgan Honda, an authorized Honda dealership. During that visit, the Honda technician documented that the cooling system fluid level was low and that no external leaks were found. The technician documented that they suspected the head gasket was causing internal coolant loss over time. I was instructed to monitor the vehicle and was provided an estimate of approximately $4,400 plus tax for head gasket replacement. I specifically asked the Honda service advisor whether the head gasket could be repaired at that time or whether anything could be done to prevent the suspected problem from progressing. I was told there was nothing that could be done at that point other than monitor the vehicle. Within weeks, multiple warning lights illuminated on my dashboard and the vehicle began experiencing significant drivability problems, including hesitation, misfiring, and loss of acceleration. The loss of acceleration was particularly concerning because the vehicle did not respond or accelerate normally while being driven. I took the vehicle to Integrity Automotive on September 25, 2025, at 208,583 miles. The engine was checked, and the ignition coils and spark plugs were replaced. Despite those repairs, the vehicle ultimately required major engine repairs on November 8, 2025, at 210,230 miles. The cylinder head gasket was replaced and the cylinder head was serviced/repaired. The fuel injectors, spark plugs, and serpentine belt were also replaced, and the cooling system and drivability/performance were checked. Only approximately 2,691 miles elapsed between the Honda dealership documenting the suspected i

Filed Jul 11, 2026 · Engine, Fuel system · VA

I own a 2018 Honda Accord LX 1.5T. The vehicle has developed an intermittent hard-start condition after sitting overnight. The engine cranks for approximately 5–6 seconds before starting and runs very rough for the first 2–5 seconds before smoothing out. Warm restarts are normal. While driving, the vehicle hesitates and stumbles during acceleration, is slow to build RPM, and fuel economy has noticeably decreased. During one hard acceleration event, the vehicle lost power and the check engine light flashed. I also observed that if I turn the ignition on and allow the fuel pump to prime for several seconds before starting the engine, the vehicle starts noticeably quicker than if I start it immediately. This makes me concerned that the fuel system may not be maintaining proper fuel pressure after the vehicle sits. Because of the hard starting, hesitation, intermittent loss of power during acceleration, and the improvement after allowing the fuel pump to prime, I am submitting this complaint for investigation because these symptoms could create a safety risk when entering traffic or accelerating.

Filed Apr 21, 2026 · Fuel system · 40,000 miles · TX

The contact owns a 2018 Honda Accord. The contact stated that while driving at various speeds, the vehicle either hesitated or stalled with the "Emissions System Fault", "Engine Power Reduced", "See your Dealer" messages displayed. The contact then received notification of the federal safety agency Campaign Number: 23V858000 (Fuel System, Gasoline), and the vehicle was taken to the dealer to be repaired under the recall. The vehicle was repaired, but the failure persisted. The vehicle was taken back to the dealer approximately six times after the recall repair. The spark plugs, ignition coils, and turbo charger were replaced after several visits; however, failure persisted. The vehicle was also taken to an independent mechanic, and the battery was replaced but the failure persisted. The vehicle was taken back to the dealer, and the contact was informed that the wiring harness and head gasket needed to be replaced. The manufacturer was notified of the failure and provided a case number, but offered no additional assistance. The vehicle remained with the dealer unrepaired. The failure mileage was approximately 40,000.

Filed Apr 5, 2026 · Engine · TX

I was driving and the engine light started flashing, the car started to hesitate and would not go over 20 mph. I took it to the Honda dealership in Frisco, TX and they diagnosed the issue using Boroscope and recommended Head Gasket replacement with spark plugs due to plugs being fouled from coolant leaking into combustion chamber.

Filed Dec 11, 2025 · Engine · NY

While driving on the NJ Garden State Parkway on an incline, the car went into LIMP HOME MODE in the middle of heavy traffic causing the speed to get dangeriousily very slow. I had to make my way across many lanes to get the edge of the road. After shutting off car I was able to restart and drive to work. My father came to my work and looked at car and added Honda antifreeze becuase it had seeped into combustion chambers Then drove the our Honda dealer. Just before he got to dealer driveway the car missed and hesitated but was able to make it to dealer. Dealer determined it was the common problem with the 1.5T engines, the head gasket failed. Check engine light never went on or any overheating (I was lucky) .While engine was apart, other work was agreed to as being cost-effective. The car prevousily had Honda car with 0 deductable until 100,000 miles. Car has always been serviced by dealer with more service than Honda requires and I have all service records from purchase to prove it. Last service before incident was 10/14/2025 . What makes this worse is that my son (2018 Civic) and my brother (2020 Accord) also have Honda cars that are destined for the same failure based on what is known about the defective 1.5T engines.

Filed Oct 9, 2025 · Engine, Fuel system · IL

I own a 2018 Honda Accord EX-L equipped with the 1.5-liter turbo engine. Over time, the vehicle began showing symptoms of coolant loss without any visible leaks, a sweet odor under the hood, and intermittent white smoke from the exhaust after startup. The engine would sometimes idle roughly and hesitate under acceleration. No external leaks were found by my mechanic. I later learned that these symptoms are consistent with a possible head-gasket or coolant-intrusion issue affecting this engine type. The problem poses a potential safety risk because coolant can enter the combustion chambers, leading to engine misfire, loss of power, or complete engine failure while driving. The issue has not yet been formally recalled, but I have seen multiple complaints and reports of similar failures in 2018–2022 Accords, Civics, and CR-Vs with the same 1.5-liter turbo engine. A warning light (“check engine”) appeared intermittently, and the temperature gauge fluctuated during normal driving. The problem has been inspected by an independent repair shop, but Honda has not provided a permanent repair or warranty coverage. The issue appears to be consistent with the allegations in recent class action filings regarding head-gasket and coolant-leak defects in Honda 1.5T engines.

Filed Sep 23, 2025 · Electrical, Engine · NY

I own a 2018 Honda Accord Sport. About 2–3 months ago, the car began having repeated engine misfires (P0301), hesitation, and stalling while driving. At the same time, multiple dashboard warnings appear, including Steering Assist Reduced, Brake System Problem, Collision Mitigation Braking System Problem, Adaptive Cruise Control System Problem, Emission System Problem, and Hill Start Assist Problem, these failures occur suddenly while the vehicle is in motion, creating a serious risk of loss of engine power, reduced braking performance, loss of steering assist, and disabled crash-avoidance systems. I have already performed extensive maintenance: new ignition coils, a full tune-up, compression test, spark test, and battery/alternator check, yet the issues remain. Diagnostic scans also showed U0416-68 (invalid data from ABS/VSA module) in addition to the misfire. This suggests not only a fuel/propulsion defect but also a possible computer/control module failure that links engine, brakes, steering, and ADAS systems. These conditions match known recalls for the Accord, including 23V858000 (fuel pump failure), 20V314000 (low-pressure fuel pump), and 20V771000 (BCM software issue), yet my VIN does not currently show as included. The fact that multiple critical safety systems fail simultaneously makes this a major safety hazard that could easily lead to an accident if the car stalls, loses braking, or loses steering assist in traffic. I opened a case with Honda Customer Service (Case #15868389), but they refused to cover the repair since my VIN is not listed, despite the failures being identical to those described in the recalls. I strongly believe my vehicle should be included, and I request that the federal safety agency investigate whether the recall VIN range needs to be expanded.

Filed Sep 5, 2025 · Electrical, Engine · FL

- Year: 2018 - Make: Honda - Model: Accord Sport 1.5 Turbo - Vehicle Identification Number : [XXX] I am writing to report a safety concern with my 2018 Honda Accord Sport 1.5 Turbo. The vehicle has developed a head gasket problem, which has resulted in significant engine issues. Additionally, I have experienced fuel injector problems, leading to decreased fuel efficiency and rough engine performance. Despite following the recommended maintenance schedule and addressing the issues with the dealer, the problems persist. I have been quoted $7,800 for repairs, which is unacceptable given the vehicle's age and mileage (currently 114,848 miles). I am concerned about the safety and reliability of the vehicle, especially when driving on the highway. The vehicle's blown head gasket has caused ¹: - Loss of power, leading to potential safety issues on the road - Engine hesitation and shutdown while driving, which can increase the risk of accidents I request that the federal safety agency investigate this matter further and take necessary actions to address the recurring issues with the 2018 Honda Accord 1.5 Turbo engine. I would appreciate guidance on potential next steps to resolve this issue and ensure the vehicle's safety and reliability. - Repair estimates and records from the dealer - Maintenance records, including oil changes and fuel system cleanings - Correspondence with Honda dealership and corporate office Other owners have reported similar issues with the 2018 Honda Accord 1.5 Turbo, including fuel injector problems and blown head gaskets ² ³ ⁴. Please Help us. Investigate this issue and help us the consumers. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 6, 2025 · Engine · PA

While driving my 2018 Honda Accord, the engine began running roughly and the check engine lights and multiple warning lights came on. The vehicle was taken to a Honda dealership for diagnosis. The service department informed me that coolant was leaking into the engine, causing damage to the head gasket and cylinders 2 and 3. They confirmed this issue and recommended either an expensive head gasket/cylinder repair or a full engine replacement. Prior to this failure, I occasionally noticed mild engine hesitation, but no specific warning messages about low coolant or overheating appeared until the check engine light activated. The dealership stated this is not an uncommon issue with this engine. Upon further research, I discovered many other 2018 Accord owners with the same 1.5L turbocharged engine have reported coolant intrusion, cylinder damage, and head gasket failures — often affecting cylinders 2 and 3 specifically. This appears to be a design or manufacturing defect in the engine. This type of failure poses a safety risk due to potential engine misfires, power loss, or stalling while driving. The problem was confirmed by a licensed Honda service center, and I believe this issue should be investigated further for potential recall or manufacturer accountability.

Filed May 14, 2025 · Engine · 116,000 miles · MD

The contact owns a 2018 Honda Accord. The contact stated that while attempting to start the vehicle during cold weather, the vehicle hesitated while starting. The contact stated that while driving at an undisclosed speed, the vehicle independently went into LIMP Mode. The check engine warning light illuminated. The vehicle was taken to a local dealer, where it was diagnosed with a blown head gasket and a GDI injector failure. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 116,000.

Filed Apr 15, 2025 · Fuel system · NE

My vehicle is experiencing engine hesitation and it's getting worse every day I drive my car. This is a known side effect of the Honda Safety Recall notice I originally received in February of 2024. I received initial notification of a safety recall for my Honda vehicle in February of 2024 and it stated the safety issues of a possible faulty fuel pump modular. The letter expressed that they have no available parts but were working on getting them. I then received a 2nd letter regarding the fuel pump in May of 2024 and that parts were limited so they were focusing on customers who were experiencing side effect/safety issues with their car. I then received a 3rd letter in November of 2024 stating parts were ready and I just needed to contact my local Honda dealership to have my fuel pump modular replaced free of charge. I have called my dealership on at least two different occasions and have also taken my car in to Honda since then for general maintenance (oil change) and I keep being told they do not have the parts. The last time I spoke with them, I keep getting told that they do not have the parts. I am also always told they will probably call me in a couple weeks when they have the part but I never received that phone call from them. I can never seem to get a straight answer from them and am always told another excuse as to why my car and my family's safety is not important enough for them. I've even been told some of those replacement fuel pumps are needed for their newer cars.