2018 Honda Accord engine problems

Filed Nov 4, 2026 · Engine · 104,000 miles · CA

The contact owns a 2018 Honda Accord. The contact stated that while driving at 40 MPH, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The RPM was elevated above 2,000 RPM, but the engine shuddered, and the vehicle lost motive power. The dealer was contacted and made aware of the failure. The vehicle was taken to the dealer, where it was diagnosed with a blown head gasket. The contact was informed that there was a misfire in cylinders #2 and #3. The contact was informed that there was coolant mixed into the engine oil. In addition, the contact was informed that the head gasket and the engine needed further diagnostic tests. The contact stated that the failure was a known failure with the vehicle. The manufacturer was contacted and made aware of the failure. The failure mileage was approximately 104,000.

Filed Nov 1, 2026 · Engine · CA

The check engine light came on. I took it to the dealership where I bought it. They instructed me to go to an authorized Honda repair facility. I took it in July 17, 2025 for a check engine light. The auto repair dealership said the head gasket was no good. So they repaired it my extended warranty paid for the cost. Then the repair facility did an unauthorized second disassembly without my permission So they repaired it my extended warranty paid for the cost. Then the repair facility did an unauthorized second disassembly without my permission then I was expected to pay for the engine repair. There was coolant leaking into the engine which caused the engine block to be warped. Pistons rings cylinder was completely messed up.

Filed Oct 22, 2026 · Engine · MA

Noticed that the engine temperature was slightly higher normal (went to 5 bars when always at 4) I checked and the fan was running properly and had coolant in the overflow tank. I took it to the Honda dealer, and they found that the head gasket failed and the fluid inside the radiator leaked into the cylinders. My 2018 Honda has the 2.0T engine with 126,875 miles. Honda acknowledges this design flaw on their 1.5T and 2.0 non-turbo engines but wouldn't cover my 2.0T. This 2.0T from my research is about 80-100 units of the 1,115,384 accords sold in the US 2018-2022 10th gen. The 2.0T has the same design flaw as the other two engines but Honda wont cover them. Moreover, I asked for 50% good will coverage from Honda and was flat out told no after waiting for 4 weeks to get this decision on a known mechanical engine flaw that could be a safety issue, Eg. fire or loss of power on a highway that can get someone hurt or killed.

Filed Oct 18, 2026 · Engine, Transmission · MD

My 2018 Honda Accord EX-L with the 2.0L turbocharged engine (K20C4) and 10-speed automatic has had a cylinder head gasket failure at approximately 111,000 miles. The vehicle has been maintained consistently. Starting in early October 2026, the vehicle began shaking violently under acceleration while the engine was cold, including when accelerating at highway speed and climbing hills. The shaking lasted for roughly the first 15 minutes of every drive. No check engine light or diagnostic trouble codes appeared. In mid-October 2026, a Honda dealership diagnosed coolant leaking past the cylinder head gasket into the combustion chamber and quoted approximately $5,000 for the repair. Replacement parts are on backorder with no estimated arrival date. Violent shaking during highway acceleration is a safety concern, and continued coolant leakage into the cylinders can cause further engine damage. In August 2026, American Honda extended head gasket warranty coverage to 10 years or 150,000 miles on 2018–2022 Accord 1.5T and hybrid models for the same condition: coolant entering the combustion chamber and causing misfires. The 2.0L turbo engine was excluded. A pending class action (Alcantara et al. v. American Honda, consolidated with Bissell v. American Honda, S.D. Cal.) alleges head gasket failure in Honda's 1.5L and 2.0L turbocharged engines. I ask that the federal safety agency investigate head gasket failures in 2018–2022 Accords with the 2.0L turbo engine, and whether this engine should be included in Honda's remedy.

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 Oct 6, 2026 · Engine · SC

The car was rough upon idle one day and all the lights came on and systems went down I was bout to drive to a place where the code was read that’s when I first discovered this was a known issue which this model. Head gaket

Filed Oct 5, 2026 · Engine · 80,000 miles · TX

The contact owns a 2018 Honda Accord. The contact stated that on several occasions at start-up several unknown warning lights remained illuminated. The dealer cleared the warning lights and the contact stated that during the failure the safety features disengaged. The vehicle was taken to the dealer on several occasions to be diagnosed and the contact was informed that the failure was not duplicated, and the warning lights were cleared. However, shortly after leaving the dealer the warning lights illuminated. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 80,000.

Filed Sep 23, 2026 · Engine · 150,000 miles · CA

The contact owns a 2018 Honda Accord. The contact stated that on several occasions while driving, the vehicle lost automotive power with several unknown warning lights illuminated. The vehicle was taken to an independent mechanic where it was diagnosed, and the contact was informed that the head gasket was allowing coolant to leak into the cylinders which caused the vehicle to lose automotive power. The contact was informed that the head gasket needed to be replaced. The manufacturer was not notified of the failure. The failure mileage was 150,000.

Filed Sep 22, 2026 · Electrical, Engine · TN

My car keeps losing power suddenly! Sometimes it has even started to stall while driving. Also the electrical menu has tons of errors and isn't working. There are several recalls on Honda Accords for the fuel pump and the vehicle assistance module but my vin doesn't show up.

Filed Sep 18, 2026 · Electrical, Engine · KY

this is a known issue with honda. the head gasket is blown causing all the warning lights to come up on the dash. my car has not got hot, it goes up to the H but goes right back down to normal setting. i have had my local honda dealer look at my vehicle and that is what they told me was the issue. since my car has a rebuilt title, honda won't cover the cost for the repair. i bought the car last year from an out of state small dealer with a rebuilt title. honda is being sued for this issue, because they know about it and still were making the vehicles. this is no fault of my own and honda should honor the recall and repair my car at no cost to me. as i am now unable to drive the car and i can't afford to have it repaired. i contacted honda of america and filed a claim and also a good-will request, but because of the rebuilt title, i was not eligible for help. every single honda made during these specific years 2018-2021 are having the same issues. not one car should be discriminated against because of a rebuilt title. the re-build has zero impact on the head gasket and the cylinders being too close together, and the turbo causing the head to blow. my car is right at 128,000 miles, and it’s known for the issue to start occurring around 120,000 miles. then come to also find out there’s an ongoing issue with gas leaking into the oil. they denied my request on that too. any help would be greatly appreciated! thank you for your time and consideration! -RF-