2018 Honda Accord: check engine light

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 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 5, 2026 · Fuel system · VA

In May of 2024, We got a recall letter for an inoperable fuel pump from Honda Automobile Division, & we did not get a replacement. They were short on supply, & those who experienced symptoms as engine light and may have rough engine starts were the priorities. We didn’t get a follow up after 60 days when we received the letter. Now my 2018 Accord has an engine light on, and the car starts up roughly.

Filed Sep 11, 2026 · Electrical, Engine · NC

1>Engine failure: Around the time vehicle reached 148,000 miles on it, it blew a head gasket on cylinder 2. Coolant was in the cylinders. The vehicle would not accelerate and was misfiring. 2> Safety was affected as this occured on interstate 40 and caused the vehicle to slow to an unsafe speed. 3>Problem was confirmed by Morganton Honda- Morganton NC. 4> Check engine light.

Filed Aug 19, 2026 · Driver assistance · NC

While driving my 2018 Honda Accord Sport 1.5T, multiple warning lights suddenly illuminated on the dashboard at the same time and several warning messages appeared. The vehicle displayed warnings for different systems, including a message stating, “Hill Start Assist Problem. Vehicle May Roll Upon Brake Release. See Your Dealer,” along with the check-engine light and several other warning indicators. I purchased this vehicle brand new in 2018, and since the day I purchased it, I have consistently had the vehicle serviced and maintained at an authorized Honda dealership. I have relied on Honda to perform the recommended maintenance and address any problems with the vehicle. When all of these warning lights and messages appeared, I took the vehicle to the Honda dealership. The dealership adjusted the valves and told me that everything was fine. Approximately one week later, I had to take the vehicle back because the problem was not resolved. At that time, I was told that the vehicle needed a head gasket. The vehicle had also previously required a turbo replacement. Because of the seriousness of the head-gasket diagnosis, I obtained a second opinion from another repair facility, and they also determined that the head gasket was the problem. I do not understand how a vehicle that I purchased new and have consistently maintained through Honda could experience these significant engine-related problems. I am especially concerned that numerous unrelated warning lights and safety-system messages appeared simultaneously before the head-gasket problem was diagnosed. I am submitting this complaint because I believe this issue should be investigated to determine whether other 2018 Honda Accord 1.5T vehicles are experiencing similar head-gasket, turbo, and multiple-warning-system problems and whether these failures may represent a defect that should be addressed by Honda or through a recall.

Filed Aug 18, 2026 · Engine · AL

The car suddenly stopped speeding up on the highway, and the check engine light began to flash. There were no warning signs before this occurred. I was driving with my kids when I had to think and move quickly off the highway because there were other cars behind us. The car would only roll because it wouldn’t speed up. Yesterday, on August 17, the car was towed to a Honda dealership, where they ran some tests. They found out that the car has a blown head gasket.

Filed Aug 17, 2026 · Electrical · 127,000 miles · KY

The contact owns a 2018 Honda Accord. The contact stated that after stopping the vehicle, the check engine, stabili-trak, steering, and the Forward Collision Avoidance warning lights were illuminated, with unknown messages displayed. The vehicle was taken to the local dealer, and a system reset was performed, and the contact was informed that the battery needed to be replaced. The contact stated that the battery was recently replaced. The contact retrieved the vehicle, and hours later the failure reoccurred. The cause of the failure was not yet determined, and the vehicle was not yet repaired. The manufacturer was not yet contacted. The failure mileage was 127,000.

Filed Aug 14, 2026 · Driver assistance, Engine · KS

The head gasket is failing and causing the engine to overheat and misfire. Its a repeating issue I see online and have taken it to a certified Honda mechanic multiple times. The first diagnosis stated that the biggest issue was the fuel injections. Now this second diagnosis shows the head gasket. It poses a great danger especially in highways, as it causes the car to decelerate on its own and rattles as if it's losing power. It will overheat when it is idling. The check engine light turned on a week after purchasing the car from a local dealership, and the dashboard lights were wiped from the system prior to buying the car a year ago. Now I'm looking at over 7k in repairment costs while still financing a car I believed was reliable.

Filed Aug 10, 2026 · Acceleration, Electrical · CA

While driving, my vehicle began shaking/rough running and the check-engine light came on. Multiple warning lights and system warnings appeared on the dashboard, including the brake system, steering, traction control, and TPMS warnings. The vehicle experienced noticeable shaking and reduced/abnormal performance. I am concerned that this may be a safety-related defect because multiple vehicle systems are being affected.

Filed Aug 8, 2026 · Transmission · GA

My fiancé was driving my 2018 Honda Accord when the vehicle suddenly jolted violently while accelerating up a bridge. Immediately afterward, multiple warning lights, including the check engine light, came on and the vehicle lost all power. Thankfully, she was able to coast down the bridge and pull into an empty parking lot. This was extremely dangerous because the vehicle lost power while being driven and could have caused a serious accident. After turning the vehicle off and restarting it, the car appeared to operate normally. Because the issue was intermittent, I initially suspected the battery. I had the battery tested multiple times, but it was fine. Since the problem continued, I took the vehicle to a Honda dealership. They diagnosed a blown head gasket and estimated the repair would cost approximately $6,000. The vehicle is only worth about $6,000, making the repair financially unreasonable. Apparently this is a known/common issue with 2018 Honda Accords. I requested Honda goodwill assistance, but Honda declined. I then took the vehicle to a second independent repair shop for another opinion. They advised that the head gasket needed for the vehicle was on back order and therefore could not provide a repair estimate. The fact that this replacement component is currently on back order is concerning and raises further questions about how frequently this repair is being needed. If Honda cannot keep enough replacement parts in stock to service affected vehicles, it further suggests that this may be a widespread issue that deserves additional investigation. The vehicle is available for inspection upon request and has been inspected by both a Honda dealership and an independent repair shop. I am extremely concerned that a vehicle can suddenly lose all power while being driven and that a repair for a known/common issue costs nearly the entire value of the car. I believe this issue warrants further investigation by Honda and consideration of a recall or assistance.

Filed Jul 29, 2026 · Engine · CT

At roughly 83,000 miles, my 2018 Honda Accord 1.5Lt experienced a major engine failure caused by a blown head gasket. At the time of the failure, I was driving on a major road. While accelerating, the vehicle had "bucked" forward, which triggered the engine light to flash at which time the vehicle had no longer responded to me pushing on the gas pedal. This caused a major safety issue as I then had to get off of the road to avoid collisions with other vehicles. I immediately brought the car to a Honda dealership, who confirmed that the head gasket needed to be replaced. There were no prior indications that the vehicle had any issues.

Filed Jul 23, 2026 · Engine, Fuel system · VA

My Accord reported multiple warnings at engine start up (check engine light, warnings about cruise control, etc.), and the engine ran rougher than normal. I immediately drove to a Honda dealer for service. The Honda dealer, Checkered Flag Honda of Norfolk, Virginia, diagnosed a blown head gasket in cylinder 2, which allowed all coolant to drain into the engine. They also indicated that fuel injectors and spark plugs were compromised and required replacement. The vehicle has approximately 75,000 miles, has received regular maintenance, and was operated in normal driving conditions.