2014 Honda Odyssey: misfire or rough idle

Filed Apr 26, 2026 · Engine · NV

About mid-2025, Honda announced a warranty extension campaign (not a formal the federal safety agency recall) for: * 2013–2017 Honda Odyssey (and some Pilots) * Related to VCM (Variable Cylinder Management) What the problem was: * Piston rings wear prematurely * Oil gets past the rings → fouls spark plugs * Leads to: * Misfires (P0301–P0304) * Oil consumption * Rough running Mechanism: * Cylinder deactivation (VCM) → uneven temps → carbon buildup + ring sticking * Sometimes described loosely as a “piston/gasket issue,” even though it’s really piston rings + oil control What Honda did: * Extended powertrain warranty to: * 10 years / 150,000 miles * Covered repairs like: * Piston ring replacement * Spark plugs, etc. In March 2023 I had multiple piston ring failures costing me almost $4k to fix. I submitted a claim with receipts and the work was done at a dealership. Honda said I had all the appropriate paperwork and would get back to me in 6-9 weeks. That was 7 months ago

Filed Apr 10, 2026 · Engine · MN

All of this has been diagnosed and confirmed by Richfield-Bloomington Honda. It is a catostrophic failure of the motor. Cylinder 6 is misfiring. They are recommending a full motor replacement. Last year, I had the piston ring issue on this car and the dealership had to rebuild the motor. The van has about 125,000 miles on it and is good service, including the repaired motor. We are the single owners of the vehicle. After this happened, Honda Corporation was notified, a case was open by both the Richfield Honda Dealership where we purchased our vehicle and by our family. Both were denied. This was a huge safety issue. I was driving home and the check engine light started blinking and the car started shaking. I pulled up to the nearest mechanic (4 miles). They recommended towing it the 200 miles to where I had engine work done the previous year. I was STRANDED in Iowa during this and at the goodwill of some local helpful folks. Luckily, I did not have my kids and I did have cell phone reception where the light went off. This same motor has had two HUGE, vehicle-totaling issues in the last two years.

Filed Jan 29, 2026 · Engine · CA

The piston ring function has deteriorated causing ring low wear toughness such to the point that sludge has been created fowling the spark plug. This leads to carbon fowling and misfiring of the engine. There have been two incident's one in March of 2025 and the second in Late July of 2025. Both times we after my wife freak out because the car was falling apart she had it towed to a mechanic and both times they said it was caused by what I identified above. A few weeks later a notice of a warrantee exception was sent out and we thought great we will take it in and they will fix it. If we had know about the warrantee extension prior we would have brought it to Honda. Honda told us that unless the lights are on we won't fix it. So they said we needed to wait to it breaks down somewhere and then have it towed to the nearest Honda by Jan. 31st, 2026 and they will fix it. After that tough luck. We are looking for an exception to this rule and I have sent in the necessary information proving that the problem exists as evidenced by two licensed mechanics. If and exception is not granted I will have no other choice but to bring it to the better business bureau and 7 on your side a local consumer advocate from KGO TV and get them to come after you to make this right. We have been a loyal advocate for Honda for over 12 years and just want this to be made right. Please don't make us have to expose this miscarriage of good faith. Please respond to this quickly as there are only two days left in the extended warrantee. I talked to a case worker today and they told me I was out of luck. I am not happy as you can imagine [XXX] & [XXX] , [XXX] . 1-29-2026 INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 24, 2026 · Engine · MD

On 10/03/2021 I was driving on the road and they car started acting up and the lights on the dashboard all start light up, so I drove to the dealer did a diagnosis on the car came out To be misfire and piston ring 4 fault. So I did the repair that are required for me to operate my vehicle safely. So four years later Honda did the recall. I submitted my documentation and repair receipt. Honda at first denied my claim saying I don’t have a proof of payment ( which clearly shows on my receipt it’s been paid with a Visa card), so I replied back with the Honda dealer’s billing personal contact info so the can verify that it’s been paid. So that takes care that. Then they move on to denying me again saying I don’t have the correct code on my invoice. So I attached the dealer repair managers contact info for them to verify the repair ( which the manager said American Honda should honor the repair since they issue the recall) and after all whose work Honda is still denying it. I did some searching on the net. I am not alone on this. A lot of honda owners are having the same issues did the repair with their hard earned money and when it comes to recall. American Honda motors are trying everything they can to dishonor it. I thing there must be something that we can do to stop this.

Filed Jan 15, 2026 · Engine · NJ

Vehicle: 2014 Honda Odyssey, VIN [XXX] , approximately 88,000 miles. In October 2025, the vehicle developed a strong burning-like odor from the HVAC vents, the temperature gauge rose, and an “Engine Hot” warning message appeared. At the same time, engine performance deteriorated and the engine began misfiring. Due to the overheating warning and drivability issues, I stopped using the vehicle and brought it to Pit Stop Auto Center (203 Clinton Place, Long Branch, NJ 07740) for inspection. Component/system that failed or malfunctioned: The engine head gasket failed (engine/cooling system). The failure resulted in internal oil-to-coolant cross-contamination, with a milky/frothy oil–coolant mixture visible in the coolant reservoir and additional visible oil contamination when removing the coolant cap. The mechanic also stated in a message dated October 29, 2025 that after removing the water pump, they discovered that engine oil was mixed with coolant inside the cooling system. How safety was put at risk: The head gasket failure caused an engine overheating condition (“Engine Hot” warning) and misfiring/reduced performance, creating a risk of loss of power and breakdown while driving. The burning odor from the vents also raised safety concerns. I brought the vehicle in to prevent further damage and unsafe operation. Has the problem been reproduced or confirmed by a dealer or independent service center: The problem was confirmed by an independent service center (Pit Stop Auto Center) based on inspection and documented evidence of oil mixed with coolant. Has the vehicle/component been inspected by the manufacturer, police, insurance, or others: by DCH Kay Honda/Pit Stop Auto Center Warning lamps/messages/symptoms prior to failure: Burning odor from vents, elevated temperature gauge, and “Engine Hot” warning message, with noticeable engine performance deterioration and misfiring beginning in October 2025. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 25, 2025 · Engine · KY

The incident happened in December 2022; the vehicle is available for inspection still. Without warning, the engine light started blinking, and engine ran very rough, so I ended up pulled over and stuck until we could tow to the local Honda dealership. Then was without a car for several days. The dealership found error code P0302 (misfire on cylinder 2), due to oil gumming up on the spark plugs, caused by the eco system design flaw in the 2014 Odyssey. The dealer quoted $5640 to replace the 1-3 piston rings. I could not afford this, so they replaced all 6 plugs and cleared the codes for a short term fix ($465). Which brings us to now, when Honda has offered a warranty extension and to reimburse for previous repairs related to this problem. I submitted my paperwork for the $465 reimbursement a month ago and have had multiple phone calls with Honda, and several "escalations" to supposed supervisors, each of whom seem to have not even looked at the incident details. Honda has denied the claim. The paperwork I submitted to them is from the dealer repair in Dec. 2022 and states "misfire on cylinder 2, need piston ring repair on cylinders 1-3, P0302 was the dtc error code, replaced all 6 plugs and cleared codes for short term fix, for long term fix, vehicle needs the 1-3 piston rings replaced." The Honda reps claim the dealer service did not use the right wording; it should have the words "fouled by oil" in the service report (but they don't provide appropriate wording for service departments to use). The last voicemail I received from them said there was no error code provided (which there clearly was). Honda is not interested in fulfilling the reimbursement their latest campaign promises. Beyond that, the long term fix is not covered on the warranty extension, because the vehicle is not currently broken. So I am left with a van that I can't drive on the highway or out of town, since it can happen again without warning. This is a safety risk for my family. Shame!!

Filed Aug 6, 2025 · Engine, Fuel system · MD

A poorly designed engine leads to misfires even after proper maintenance, increasing the chances of a crash. On Monday, May 12th, 2025, the MIL indicator came on and began flashing while I was driving. The engine began to misfire so violently that the vehicle was nearly undriveable; acceleration was dangerously poor. After I got home, I used a OBD-II code scanner and pulled a "P0301 - Cylinder 1 misfire" DTC. Then, I did some research, and found that a poorly designed engine causes oil to burn inside the cylinders and foul the spark plugs. I inspected the spark plugs and found multiple fouled plugs, specifically on the cylinders on which Honda's Variable Cylinder Management activates on, cylinders 1-4. I replaced all six spark plugs, and the issue went away, as expected. Photos of the fouled plugs are attached. Honda is aware of this problem, as it recently extended the warranty of the engine in this vehicle. I received a letter on July 31, 2025, titled, "Warranty Extension: 2013-15 Pilot & 2013-17 Odyssey MIL Comes on with DTCs P0301 thru P0304." (See uploaded file.) Spark plug inspection and replacement is part of the repair, in addition to a partial engine rebuild and software update. However, the warranty extension only applies *after* the misfiring has started, which is no help to the safety of this vehicle, as the issue can start at any moment while driving. Furthermore, the warranty extension only adds an extra six months to many of the affected vehicles. Therefore, any vehicle this extension applies to is an unsafe vehicle unless the safety issue already occurred and was repaired. If the issue presents itself after this time period, the owner is left with an unremedied vehicle and with an expensive repair bill.

Filed Nov 18, 2023 · Engine · OH

I have now had a flashing check engine twice on my van. The first time it happened next to a well known national mechanic chain while in a car wash. 4 other lights came on all the sudden along with a flashing check engine light. You could feel the engine rumbling. I took it straight to the mechanic next to us and they told me I had a misfire and needed spark plugs and a ignition coil. They did that work and it did temporarily fix the problem. 6 months later the same thing happens. So I took it to a Honda dealer this time. They informed me this is actually a much larger known issue with this engine. The ring on the cylinder shifts/brakes allowing oil to come up and it ruins the spark plug, causing a misfire. They have to do a complete engine rebuild. The mechanic advised Honda knows about this issue and they see it all the time. They also warned me it is dangerous to drive the vehicle when this occurs as the engine could fail and there is a fire risk from the unburned fuel in the exhaust.

Filed Aug 28, 2023 · Engine · IL

My vehicle had check engine line was blinking and I took to the Honda. They immediately diagnosed the code as Cylinder 3 Misfire. Upon checking they identified the root cause is Piston ring needs to replace as oil was leaking in the cylinder. I was told that this can cause severe dame to vehicle and passenger as time engine can stop and cause the fire also. I was told that this issue is well known to Honda. When I reached out to Honda they said that your vehicle is not part of the recall and we cannot reimburse the repair expense. I had maintained my car up to date. There was no maintenances service to replace the piston ring at certain mileage. I am single owner. I am baffled on how this was not the manufacturer issue? How was the scope of the investigation on which vehicle impacted determined? Why was my vin number excluded from recall as certainly it is impacted? This issue put me at the risk with safety. Additionally, why do I need to pay for this Manufactuing defects? Is vehicle manufacturer responsibility not applicable when Car is outside of the warranty due to mileage and years?

Filed Nov 17, 2022 · Engine · CA

Morning when we start out day, check engine light started flashing and car begin misfiring. The car doesnt ran fine after that.. I took car to honda dealership and said the o-rings need replaced. They tried to get honda to pay for repairs because they said it's the same issue that LED to a class action lawsuit for 2011-2013 honda odysseys. In that case the "piston rings in certain cylinders may rotate and align, leading to engine oil consumption and spark plug fouling." honda of america said they would not pay to fix my vehicle even though its the same issue.

Filed Sep 30, 2022 · Engine · MN

One day I went to turn my car on and the check engine light came on with another light. Not sure what the other light was. My car was shaking to the point where I knew I shouldn't drive it. I called the dealership to see if it was drivable. They said it was not since the check engine light was flashing. I had it towed into the dealership. After an inspection they said it was an engine misfire and that cylinders 1-3 needed new piston rings. The spark plug was oil fouled as well. I had very low mileage on the vehicle. I had only 68,400 miles on the car. The repair was a little over $3200 to fix.

Filed Aug 8, 2020 · Transmission · 120,000 miles · TN

While driving on the interstate, vehicle started to shudder and check engine indicator light started flashing. Exited the next exit and took took the van to the local mechanic shop the next morning. They replaced the spark plugs, due to being fouled, and also coil pack for cylinder 3, due to misfire code on cylinder 3. Within a month, the vehicle experienced the same shudder and flashing check engine indicator light. Took the van in to my mechanic and the code showed misfire on cylinder 3. He replaced the spark plug due to the fouling of the new plug and saved it for me to present to honda. He also switched coil pack 2 with coil pack 3. He advised me of honda technical service bulletin 13-081 and explained the build date of our odyssey was listed as 08/13 and we should be included in the warranty extension that honda was extending to the 11-13 models with the same exact issue as we were experiencing. I called the local honda dealership and explained the circumstances and situation and the technician advised me our van was not covered under the warranty extension and as problems continued to arise to continue what we were doing and following recommendations of our mechanic (who has advised me to now get rid of vehicle due to honda's position) and that in the technician's opinion fuel injectors would probably be the next course of action.