2015 Honda Odyssey power train problems

“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 NHTSA to investigate this as a safety-related defect.””

“The car sporadically does not shift from 1st 2 second and then abruptly shuts cause a loud jerk of engine and car. It is startling and scary when it happens. I’m afraid the car will break down while in the road. Every time we take the car to dealership they “cannot replicate” issue therefore there is nothing to fix on an issue that is all over the internet with Honda vans and suvs.”

“I am reporting an engine defect covered under Honda’s recent warranty extension for 2013–2017 Odyssey / 2013–2015 Pilot vehicles when the MIL comes on with DTCs P0301–P0304. On November 1, 2022, I was stranded on the road when the check-engine light came on. At Honda Muller of Gurnee, the dealer diagnosed misfires consistent with P0301–P0304, explaining the underlying cause as piston ring function deterioration with sludge causing oil to foul the spark plugs. I was told my original warranty had expired only about six weeks earlier (on August 29, 2022). Coverage was denied and I was quoted over $6,000. Because I couldn’t afford the repair, the dealer recommended replacing the spark plugs as a temporary measure only, stating this would not fix the underlying defect. I proceeded with that temporary measure. On November 11, 2022, American Honda formally acknowledged my concern in writing, confirming that Case #13455791 had been opened and escalated to a case manager in direct response to my diagnosis from November 1, 2022. Despite this acknowledgment, my repair request was denied. In 2025 I received Honda’s warranty extension letter acknowledging coverage for this…”

“Vehicle shifts abruptly from 1st to 2nd gear at feels like car will fall apart when that happens. It has happened multiple time throughout the time we owned the vehicle. Dealerships just does a transmission fluid replacement $230 watch time but no permanent solution. Were afraid transmission will fail in traffic.”

“The contact owns a 2015 Honda Odyssey. The contact stated that while driving at an undisclosed speed, the RPM gauge was fluctuating. Additionally, the vehicle was shuddering while shifting between gears. The vehicle was taken to an independent mechanic, where it was diagnosed that the PGM-FI software had failed and needed to be updated. The vehicle was not repaired. There was no further information provided. The manufacturer was made aware of the failure, and a case was opened. The failure mileage was approximately 61,030.”

“This is copy of email I sent to Honda I am the original owner of a 2015 Honda Odyssey. I recently had the engine light come on and the diagnosis was "oil is coming through the piston rings into firing chamber and causing oil burning symptoms. Recommend replacing piston rings1-3". I had the work done at the Honda of Coeur d Alene, ID dealership for a total of $4040.66. This is a major repair for a van with low miles on it and Honda service technicians agreed. Researching online I discovered this is a problem with other Honda models and there have been recalls to fix the issue. I believe Honda should step up and cover the cost of this repair. This is my second Odyssey and the quality- lots of repairs to this van- has been very poor. I will be shopping for a car in the near future and at this point Honda will not be on my list. There are many online forums reporting this issue and past models have been recalled.”