2015 Honda Odyssey engine problems

Filed Nov 5, 2026 · Engine · 141,000 miles · MO

The contact owns a 2015 Honda Odyssey. The contact stated that while driving, the vehicle unexpectedly stalled. The vehicle was towed to the dealer, where the spool valve filter and alternator were replaced. The vehicle was repaired; however, two weeks later, the check engine warning light illuminated. The vehicle was taken back to the dealer, where it was diagnosed and determined that oil had seeped through the spark plugs into the pistons, and that the pistons needed to be replaced. The manufacturer was notified of the failure; however, the manufacturer declined to provide assistance. The failure mileage was 141,000.

Filed Oct 23, 2026 · Engine · FL

Vehicle Information:Year/Make/Model: 2015 Honda Odyssey EX-L VIN: [XXX] Mileage: Approximately 45, 200 miles Component / Defect: Engine Oil Leak leading to Alternator Failure (Front Spool Valve / Valve Cover Gasket Leak onto Alternator) Summary of Incident and Service History: My car overheated and would not start on several occasions over the last year and a half starting in July 2025, leaving me stranded and requiring it to be towed. My car has been in service at the dealer multiple times for approximately 2 weeks each time. Oil Leak and Alternator Hazard: The vehicle experienced engine oil leaking directly onto/into the alternator. According to communications from Honda service personnel ([XXX]), oil leaking from the front spool valve and valve cover gaskets penetrates the alternator, causing component failure. The dealership explicitly warned that failure to complete these repairs would result in repeated alternator failure. XXX Service: The vehicle was brought in for diagnostic work and repairs at Brickell Honda Performed services included diagnostic procedures, engine oil & filter replacement, radiator fan motor replacement, A/C condenser fan motor replacement, and tire rotation. Total Paid: $2,443.60 Additional Repair Estimates Provided: Valve cover gaskets & spark plug replacement: $1,901.18 plus tax Front spool valve replacement: $1,641.70 plus tax Prior Related Invoices: An earlier invoice was issued on XXX for $2,096.29 by Brickell Honda for alternator replacement and other maintenance services. Safety Risk Statement: An unaddressed oil leak dripping onto the alternator poses a serious electrical component failure hazard while operating the vehicle. Sudden loss of electrical power while driving can cause engine stalling, loss of power steering, loss of headlights/lighting, and disablement in traffic, presenting a significant risk of collision and vehicle safety hazard. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 29, 2026 · Engine · TN

I first experienced an engine misfire in February 2025. The vehicle had a P0301 misfire code, and at the time I was unaware of Honda’s extended warranty related to this issue. We had a trusted mechanic friend inspect the vehicle and replace the spark plugs and ignition coils. He noted that there was significant carbon buildup. After those repairs, the vehicle appeared to run normally, and we believed the issue had been resolved. Later, I received Honda’s extended warranty notice and realized that the issue I experienced may have been related to the condition covered by the warranty. I contacted my local Honda dealership in August 2025 and explained the prior misfire, repairs performed, and the warranty notice I had received. However, because the check engine light was not currently illuminated, I was told there was nothing that could be done unless the vehicle was actively displaying the issue. I also contacted Honda Corporate regarding this matter. I was advised that reimbursement for some of the repairs I had already completed might be possible, but that it would need to be reviewed. I chose not to submit those receipts at the time because I was concerned that doing so might impact my ability to use the extended warranty coverage if the problem returned. Unfortunately, the issue appears to be progressing. On June 2, 2026, the vehicle set a P3400 code, which is related to the Variable Cylinder Management (VCM) system. At that time, the oil level was low. After adding oil and completing several driving cycles, the check engine light turned off. However, the vehicle continues to consume oil at an alarming rate. I have had to add additional oil again in July. The problem is progressing - it is the issue that should be covered by warranty but holds refuses to do anything because the light isn’t currently on,

Filed Jul 28, 2026 · Electrical, Engine · TX

American Honda Motor Co., Inc. issued an official Warranty Extension in July 2025 covering engine misfires from piston ring deterioration (DTCs P0301-P0304) on 2013-15 Pilot and 2013-17 Odyssey vehicles. My 2015 Honda Odyssey (VIN: [XXX]) experienced this exact defect, resulting in severe engine misfires and secondary alternator failure caused directly by engine fluid saturation leaking onto it from the primary defect. I paid $5,275.80 for repairs prior to campaign awareness (Invoices XXX and XXX). I submitted complete reimbursement documentation on January 31, 2026. Honda has withheld my funds for 178 days (which is 122 days past their promised 8 week deadline) while corporate customer care agents falsely claim payment is “approved but pending final management sign- off.” I have called 11 times and corporate managers who are never available HAVE NEVER returned my calls like the representative with Honda I've spoken with each time assures. This deliberate delay subverts federal safety campaign integrity and artificially manages liability exposure. Request immediate enforcement action for an ongoing corporate warranty evasion pattern. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 15, 2026 · Engine · WI

I had an engine failure on my odyssey that was causing a single piston to misfire - that i then had a honda dealer repair for around $3500. A couple months later i received a letter indicating this specific type of error was now under a recall for my vehicle so i submitted all the documentation for the recall reimbursement. That was in August of 2025 and I have still not received reimbursement - each time I contact Honda i am told this is just the normal process but nobody is able to provide me a date of when it will be reimbursed.

Filed May 1, 2026 · Engine · WI

I bought this car from a dealer in November of 2025 just over 95k miles. Two weeks after I bought it a PO303 code for a cylinder 3 misfire appeared. I changed the spark plug and the code went away. Then on Friday, April 10th, the code came back. I replaced the spark plug for a 2nd time. The code disappeared again. Then, on April 25th the code returned and I replaced the cylinder 3 spark plug for the 3rd time. After replacing the cylinder 3 plug for the 3rd time I took the car to an auto mechanic in my area. After their diagnosis I am looking at either repairing the current engine at a cost of 4500 dollars or replacing the engine at a cost of 7-8k. I believe my engine issue is the very same issue that 2011-2013 3.5l v6 Honda engines suffer from that resulted in a lawsuit and settlement.

Filed Apr 30, 2026 · Engine · 160,000 miles · WI

The contact owns a 2015 Honda Odyssey. The contact stated that while driving at various speeds, the vehicle would hesitate to accelerate as intended while the accelerator pedal was depressed. The check engine warning light illuminated. The vehicle was towed to a local dealer, where it was diagnosed with a piston ring failure and related the failure to Honda Service Bulletin:25-061. The vehicle was not repaired due to cost. The manufacturer was made aware of the failure. The failure mileage was approximately 160,000.

Filed Apr 26, 2026 · Engine · NE

Our 2015 Honda Odyssey van has bad piston rings 1-3. The check engine light and all of the lights are on in the vehicle is not driving and idling poorly.This is the second time it has happened. The first time was under warranty at 112,000 miles, and now the van has 179,000 miles. There seems to be several recalls and known problems and warranty was extended last year, but we just missed it. The code is P0301. I took it to the Honda service and the spark plugs are fouled.

Filed Apr 3, 2026 · Engine · NY

In November 2024, the engine of my 2015 Honda Odyssey misfired and I had all spark plugs replaced. The vehicle had 102, 171 miles on it. The issue was resolved at that time. On April 1, 2026 the engine misfire returned, check engine light came on and the repair shop advised that again the engine is having the same issue. The vehicle now has 117,000 miles on it. This does not appear to be an isolated case as I have read several other similar complaints.

Filed Mar 27, 2026 · Engine, Transmission · OR

Approximately 7 months ago, my 2015 Honda Odyssey experienced an engine misfire with code P0302 (cylinder 2). All spark plugs were replaced at that time and the issue appeared resolved. However, the misfire has now returned with the check engine light on, again indicating cylinder misfire. The vehicle only has 71,000 miles on it, which makes this recurring issue particularly concerning. Based on my research, this appears to be a known defect related to Honda’s Variable Cylinder Management (VCM) system causing excessive oil consumption and spark plug fouling — an issue documented across 2013–2017 Odyssey vehicles and addressed under Honda Service Bulletin 25-061. I am requesting this complaint be on record and urge the federal safety agency to investigate this as a safety-related defect.”