2019 Honda Odyssey: misfire or rough idle

Filed Sep 29, 2026 · Fuel system · MD

In April of 2025 I had my vehicle towed to O"Donnell Honda because my car was sputtering and inoperable after getting gas a few min prior. The ran codes and got back PO300 PO3054 and PO306 misfires and unknown to me there was an active warranty recall on the fuel injectors. At this time I was withing the warranty period. The dealership told me that I got bad gas and their was nothing wrong with my car. I have spent the last 16 months taking my car back and forth to the dealer trying to figure out what this intermitent problem was with my car. I have at least three visits to the dealer and multiple phone calls with honda over this time. In addition to emails. Most times the code would disappear before I could make it to the dealer. I have also spoken to honda corporate and they have never mentioned this warranty until yesterday I had the issue again and they said it was my fuel injectors and want me to pay $2000 to repair it despite this being a known issues since 4/2025 when my car was withing the warraty period. They said they had no obligation to fix it back in May because they could not recreate the problem but that is not true according to their 21-010 Defect service bulletin. It specifically states they were to replace the fuel injectors. I have documentation to prove all of this. I have spent month and put out additional money on a situation that thye dealership refused to replace a known, warranty-extended safety defect that was officially scanned and documented prior to the 150,000-mile expiration window

Filed Sep 13, 2026 · Engine, Transmission · SC

Vehicle began to misfire on cylinder 3. As the issue continued more cylinders stared to misfire. Next was number 6, then 2 increased up the engine. Air fuel ratio was 1.6. Assuming it was fuel/air/electrical in nature, the spark plugs, and fuel injector were changed and air intake and upper valves were cleaned of carbon build up. All gaskets replaced by new. Discovered and replaced a bad egr valve. Last codes that the car displayed before towing to dealer were many misfire codes and 2 engine/transmission communication errors. Dealer shop discovered air fuel ratio of 1.35 and checked all work before. Discovered fuel pooling and some shiny areas in the engine from scoping it. Decided that if was a bad engine with internal failure and transmission. Quoted me $17000 (about the same value as the vehicle if it was jn very good condition) for a new engine and transmission or $6800 for a used engine alone at risk of replacing transmission as well assuming communication errors do not go way or transmission fails further. I have called honda corporate my reference # 16624114. I requested goodwill repair due to recalls and class action lawsuits related to connecting rods in engines of similar cars and model years. And transmissions recalls for similar cars and model years. Goodwill is unlikely but pending.

Filed Apr 21, 2026 · Engine, Fuel system · AL

[Incident Description & Manufacturer's Bad Faith] On April 6, 2026, an authorized Honda dealership (McConnell Honda in Montgomery, AL) diagnosed my vehicle (2019 Honda Odyssey EX-L, 143,097 miles) with DTC P219A (Rec replacing fuel injector set and fuel feed pipe at this time), requiring a fuel injector replacement. This exact mechanical failure is documented in Honda’s official Service Bulletin 21-010. The bulletin acknowledges that defective fuel injectors can cause engine misfires, loss of motive power, and engine stalling while driving. These conditions present an immediate and severe safety hazard. Honda established a 150,000-mile warranty extension limit for this defect in TSB 21-010. My vehicle has 143,097 miles and is well within this limit. However, American Honda Corporation has arbitrarily refused to repair the vehicle. Furthermore, on April 21, 2026, the assigned Honda Case Manager left a voicemail officially denying the repair. He explicitly refused my repeated requests to provide this denial in writing. In the voicemail, he falsely stated that my vehicle at 143,000 miles is "well outside the range" for assistance, directly contradicting Honda's own written 150,000-mile bulletin. Please review the attached documents, including the official dealership diagnostic report (DTC P219A), the repair estimate, and a copy of TSB 21-010. I have also secured the audio recording of the case manager's voicemail to prove their bad faith. Honda is knowingly leaving a dangerous vehicle with a confirmed, documented fuel system defect on the road, while actively providing false information to the consumer to avoid repair costs. I strongly request the federal safety agency to investigate Honda's deceptive and dangerous practice.

Filed Feb 20, 2026 · Fuel system · MI

The fuel injectors emaeem to be malfunctioning and the OBD for emissions is lighting up. It has been inspected by the dealer and confirmed it needs to be replaced. The OBD code is P219A and this causes misfire and potential stalling of the vehicle. Honda has issued several TSBs but none have my VIN. Some of the TSBs are TSB A18-025, TSB A21-010 and TSB ONLN9403292021. It has been inspected by Honda dealer and confirmed to be a issue but no action unless I pay them a lot of money. I would like to see if the federal safety agency can help to add my vin number to the list or help me get Honda to repair my vehicle.

Filed Dec 15, 2025 · Fuel system · 74,000 miles · MI

The contact owns a 2019 Honda Odyssey. The contact stated that the vehicle was purchased with a Salvage Title. The contact was informed by the seller that there was an unknown diagnostic trouble code for a misfire. The contact was informed that the failure was due to a failure with a fuel injector. No warning light was illuminated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was pending repair from the prior owner. The manufacturer was not notified of the failure. The failure mileage was approximately 74,000.

Filed Nov 22, 2025 · Engine · IL

We bought this van new and twice since owning it-once in 2019 at 5,418 miles and this month (November 2025) at 136,947 miles-we have been driving down the interstate with a van full of people, when without any previous warning, suddenly multiple warning lights come on all at once (the check engine light, the transmission light, the vehicle stability assist light, among others-what I have been told in LIMP mode) and the van becomes difficult to drive. The engine revs and the multiple warnings keep flashing. It has been extremely dangerous to be going at interstate speeds and suddenly thrown into a driving status where our speed is crippled to a slow pace and trying to get to an exit or shoulder without causing an accident. We have had to have the van towed both times in order to get it to a dealer to have it looked at and fixed. Both times we have been told by 2 different Honda dealership service departments that it was the rocker arm oil pressure switch and the most recent time (2025) we were told they had to also replace the rear spool valve to make the error codes go away. The code P2652 was a code that had to be cleared both times with the repairs that they made. In Nov. 2025 the dealer scanned the vehicle and found codes p0301, p0302, p0303, p0306 cylinder 1 2 3 and 6 misfires. They found code p2652 rocker arm pressure switch to be stuck on. They checked the circuit and found the wiring to be ok. They replaced the rocker arm pressure switch and rear of cylinder head problem did not change. Oil levels were where they should have been. They removed the rear rocker bridge and rear spool valve to inspect the rear spool valve and found the rear spool valve to be sticking causing the vehicle to be in constant vps. They installed a new rear spool valve and cleared codes. We do not have the components to be inspected.

Filed Jan 8, 2024 · Fuel system · ID

- Fuel injectors all need to be replaced - Cylinder misfire on a very new vehicle that should be relied upon - Dealer confirmed fuel injectors need to be replaced. Stated that this is a very common issue "I've seen a million of these". I asked why it would fail so early in the car's life and the dealer stated "problem with the milling process ... small needle like pieces break off and clog" - No - Check engine light came on for "Emissions system failure"

Filed Nov 20, 2023 · Acceleration, Engine · AZ

What component or system failed or malfunctioned, and is it available for inspection upon request? I believed the spark plug or the condense coil has an issue with my vehicle. The engine lose power at stop when I stepped on the accelerate pedal the car takes about 2 seconds idling then speed up suddenly. I am not a mechanic. Therefore, I am not so sure. It's available for inspection. How was your safety or the safety of others put at risk? Misfire of the car can be a serious issue on the road which put the driver safety at risk. Has the problem been reproduced or confirmed by a dealer or independent service center? No Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No

Filed Aug 10, 2023 · Fuel system · TN

On June 16, 2023 When I got in my van and turned on, about 8 different system failure lights started singing and light up across my dashboard. I proceeded to drive it and it drove fine most of the time but then it would misfire or loose power. I took to a mechanic who plugged unit to read all the codes it was displaying. The ones that showed were P0300-P0306 and P219B. The mechanic pulled up and saw an extended warranty from Honda had been issued for my type of van, 2019 Honda Odyssey Touring. I called Honda to make appt to get fixed and was told that my VIN wasn’t included in the extended warranty. My van is displaying the exact issues the extended warranty covers and is clearly in need of the corrective actions listed by Honda. My gas mileage has been greatly affected and my and my children’s safety. When driving it will loose power and become very jumpy. When it looses power, there are times I’m going 50-60 mph and it’s dangerous because I suddenly drop speed and could potentially be hit. There have been codes in the past that have come on and when checked they signified dirty fuel injectors and cylinder misfires. The warning messages would go off just as randomly as they appeared. This time it’s different and the lights have stayed on. I am pleading with the federal safety agency to please consider including my VIN/van in a safety recall. This is an issue that Honda should address to all 2018-2019 Honda Odysseys and not just the few it knows about. The fuel injector machining process is clogging the inside of the injectors. Honda knows this. It’s dangerous to those of us who purchased their vehicles.

Filed Jan 8, 2019 · Engine, Fuel system · 5,000 miles · OK

Upon startup of the vehicle, a strong burning smell was sensed. The vehicle was briefly put into a slow reverse to take it out of the garage and a very rough idle started, black smoke appeared out of the tail pipe and every possible error message appeared one after the other on the dash. The vehicle was then briefly put into drive for a couple inches forward back into the garage with very little power on acceleration and an even stronger burning smell. The dealer was contacted and advised having the car towed in to be evaluated. Upon evaluation the dealer advised that the issue was a leaking fuel injector caused by a faulty fuel rail design from the factory. The injector leak caused too much fuel to be put into the cylinder causing the spark plugs to fowl out. The dealer stated honda was aware of the issue also in 2018 models and they assumed they would have corrected the fuel rail design for the 2019 model. The dealer then advised that they could not make any repair until the redesigned fuel rail was released a month from now. The vehicle was purchased new 2 months ago and currently has apx 5,000 miles. The fact that this was caused by an error in the fuel rail design from the factory indicates the problem likely has been causing damage and posing a safety risk of possible engine fire from the leaking fuel injector the entire 5,000 miles of ownership. Also, it is unknown how the leak may affect the engine in the future due to the leak and design flaw persisting since it was sold new from the factory.