2014 Honda Odyssey Engine Problems

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.

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)

Had a Honda fixed for a well known piston ring problem that did not have a recall, but should have at the time repaired. In July, Honda sent us an extended warranty for the very problem we had repaired. I sent in all documentation and claim was denied twice. My dealer has sent me a voice mail confirming the repair is the exact one mentioned in the warranty extension. American Honda is claiming certain error codes must be mentioned in the work order in order to pay the claim. This is at best a bad faith move on Honda's part.

Piston failure - vehicle has always been properly maintained by Honda dealer and we have adhered to their suggestions for maintenance/repair. It has been driven in a safe and legal manner. There is no reason why this should have happened under the conditions without a defect. Vehicles currently at Regal Honda, Lakeland FL incurring $6000 worth of repairs.

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.

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)

I just went to a professional auto mechanics and they have confirmed that my 2014 Honda Odessey engine has the same symtoms and noise of a connecting rod bearings failure. The engine is making a lot of engine knocking noise. and recently, the connecting rod has failed. The safety issue is that with a stall engine on freeway, it can cause serious accident. I have the car here. I wonder if NHTSA would be interested to investigate this vehicle as it would help the public to be aware that the current Honda engine recall extends to the 2014 Honda Odessey model as well.

Back three (3) cylinders, namely #3 cylinder, constantly fouls out. Vehicle has less than 100k miles on it and has been regularly serviced.

Repair required piston rings replacements. The vehicle was only 10 years old, 61,000 miles. This is coincidental with the ECO mode shutting down 3 cylinders. As you know, the 2014 model does not have (unlike current models) a special button for the ECO mode, as such, the driver has no control over the feature. While this is a hypothesis, this might have damaged the engine from overuse of remaining cylinders or malfunction of the ones that did not engage in the ECO mode. Research online indicated that other customers reported similar issues. I do not feel it's fair for a vehicle with 61K (sixty one thousand) mileage and 9.5 years old to break down considering the use and the care I have provided for the vehicle throughout its life. I am the original owner and serviced all needed maintenance at Honda or Acura dealerships (can be evident by records on CarFax), and used only Shell or Costco gasoline, never a cheap non-branded gas. The premium that Honda commands for its brand and its recognition failed with this major over $5,000 repair. Thank you!

This started approximately one year plus ago. The problem is exhibited mostly when the vehicle is pulling away after a stop light. From a full stop n pushing the accelerator, the vehicle pulls forward a little n then totally hesitates n stops in the middle of the intersection leaving us in a position to be hit from behind. . Consequently, the vehicle suddenly jerks n moves forward rapidly - again putting us and other drivers at risk. Also, in driving in stop n go traffic, the vehicle suddenly jerks ahead n we are at risk of hitting car in front of us or getting hit from behind. We have had the van to a Honda dealer at three different times, but they are unable to get the van to replicate that motion. There were no warning lights or messages. We have noticed recalls for other vans even up to the 2013 but NOT the 2014 Honda Odyssey!! We thought by now the 2014 would have been included in the recall, but so far no luck! The vehicle has not been seen by the police or an insurance rep but is available for inspection any time. It would seem that the problem is fuel injection or some sensor. Please help before we are injured or someone else gets hurt.

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.

VCM causing overflow of oil in cylinders 3 and 6 ruining internal components. Vehicle would not accelerate on expressway had to idle to gas station. Lawsuit and extended warranty place on 07-13 odysseys for same issue .

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?

My engine needs to be re-ringed after 50000 miles after a repair of the same. Honda settled a class action suit of this issue and the repair was done by an authorized dealer. The pistons rings on certain cylinders my rotate and align which can lead to spark plug fowling. The code is P0301-P0304. This is caused by the VCM that is put on the vehicle to increase gas mileage. Thousands of Honda engines are affected by this problem. Honda needs to do more about this problem. The engines are failing and not lasting as they should.

About mid-2025, Honda announced a warranty extension campaign (not a formal NHTSA 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

Its a defective torque converter

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.

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.

I purchased this car used in 2018 from CarMax. I have done Honda dealer services ever since. Most recently in December 2021. On 4/6/22; I want to back out of my garage. The check engine light came on along with other lights. The car was vibrating. We turned the car off, back on, and it persisted. We eventually had it towed to a dealer. Yesterday, we were hit with nearly a $6,000 repair bill due to piston rings and oil getting into the spark plugs. The car only (approx) has 78,XXX miles on it. Upon further review, it appears that this is a known Honda issue with this engine (V6, automatic). There are service bulletins covering the 2011-13 model years. I am reading online that now newer model years are experiencing the same issue. It also reads like this issue will come back... I guess starting on the 2014 model years, Honda changed the piston rings. I don't believe this helped as I am seeing the same issue on my car. People have done the repair and it comes back. I contacted Honda corporate and I am waiting for a call back on a 'good will' case. I believe Honda is still using this engine.

The contact owns a 2014 Honda Odyssey. The contact stated that the vehicle hesitated while depressing the accelerator pedal, with the check engine warning light and two other unknown warning lights illuminated. The contact initially had the vehicle towed to an independent mechanic where an oil leak was discovered behind the spark plugs. After the initial failure, the contact had the spark plugs replaced four separate times. The vehicle was also taken to a dealer where it was determined that the cause of the failure was the piston rings, and the contact was given an estimate for the repair. The manufacturer was not notified of the failure. The vehicle was not repaired. The failure mileage was 93,315.