2014 Honda Odyssey: excessive oil consumption

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 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 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 May 28, 2019 · Engine · 82,000 miles · MN

P0303 misfire burning oil causing oil loss and misfire on cylinder 1-3

Filed May 15, 2019 · Engine · 89,000 miles · OH

Driving on the highway, check engine light started flashing and car begin misfiring. Had to drive very slow because of the safety issues related to misfire for a few miles to get the car off the highway. Got car to repair ship and they replaced all spark plugs because they were in bad shape and one no longer worked. The car ran fine after that. 4 months later while on highway same misfire happened. 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 Jun 23, 2017 · Engine · 30,500 miles · OH

The engine light comes up and engine is buring oil. Dealership checked after 500 miles and said it is burning oil. Told me to keep checking oil level and if low top it off till the next light comes up so that they can get diagnostoc code. Does not make sense. This is a new van and purchased new and 2 years back and now has only 31000 miles.