2019 Honda Fit: misfire or rough idle

Filed Nov 9, 2026 · Fuel system · ME

Fuel injectors failed and need replacement at 34,804 miles. Check engine light on, rough acceleration. Dealer, Dover Honda, New Hampshire, performed TSB repairs for engine misfires: carbon cleaning intake valves and computer reprogram but states this did not solve misfire issues and all fuel injectors need replacement.

Filed Jul 10, 2026 · Engine, Fuel system · OH

Purchased great condition used 2019 Fit EX on XXX from local non-Honda dealership. Nearly 10 months later, on XXX the following errors appeared on the dash: tire pressure monitor system, emissions, hill start assist, lane deviation warning, power steering, and vehicle stability assist errors on the screen, and the check engine, tire pressure monitoring system, vehicle stability assist system, and electric power steering lights were also on. I took it to a local Honda service shop (Performance Kings Honda at [XXX]), and it was diagnosed as needing fuel injectors replaced (running too rich). I approved the repair for a total cost of $1,629.32, including the diagnostic fee, parts, labor, and taxes, on XXX. This was an identical issue to a used 2018 Honda Fit EX that I had purchased on XXX which had the same symptoms and was diagnosed as the same problem (fuel injectors) in XXX, and for which I submitted a separate the federal safety agency complaint. This is an issue for the federal safety agency because it is a known issue on this make and model of car by owners and Honda. See the following: Honda Service Bulletins 21-007, 22-002, 23-042. Additionally, it's an issue I have had to deal with twice, on two separate vehicles, both of the same make and model, meaning it is likely an extremely prevalent issue for owners. Fuel injectors are an expensive repair, and they're known to be faulty on these vehicles by the manufacturer. Without correction, other major systems in the vehicle will fail, with issues such as engine misfire, overheating, catalytic converter failure, and catastrophic damage to the engine. Honda already knows this is an issue on the 2016 and 2017 models. The warranty extension they already issued for these years must be expanded or replicated to cover this issue, which has persisted in the 2018-2020 models. This should be expanded to cover additional years as well. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 14, 2026 · Engine, Fuel system · MD

Multiple warning lights lit up after starting car and driving for a short distance (less than 5 feet). Honda mechanic diagnosed it as a misfire in cylinder likely due to carbon buildup or other unknown reason. Similar incidents have happened with other 2019 Honda Fit and an extension of warranty was issued for some vehicles but not all (SB 23-042). Unfortunately, mine was apparently not covered despite the same exact issue as other reported incidents.

Filed Apr 22, 2026 · Engine · 55,666 miles · CA

The contact owns a 2019 Honda Fit. The contact stated that while driving at 40 MPH, several unknown warning lights illuminated. The vehicle was taken to a dealer for a diagnostic test. The dealer retrieved DTC: P0304 (ECM Detected Repeated Misfire in Cylinder #4). The dealer linked the failure to Technical Service Bulletin: 21-007; however, the vehicle was not covered under warranty or the bulletin. The manufacturer was notified of the failure, and confirmed the information from the dealer, and the contact was provided a case number. The vehicle was repaired. The failure mileage was 55,666.

Filed Jan 26, 2026 · Fuel system · FL

Car only has 91,000 miles and code P219A is popping up but Honda wont cover it because its the "wrong" code even though they cover fuel injectors under misfire codes.

Filed Sep 11, 2025 · Fuel system · VA

Purchased new 2019 Honda FIT. Had to have injectors replaced at dealership due to issues at 18,000 miles. At 19,743 miles started having driving issues with unusual jumping during driving/idling. Honda dealership diagnosed as misfire with excessive carbon buildup. Completed carbon cleaning procedure though only temporary repair. American Honda reviewing matter reference #4411584. Issues returned at 40,308 miles with same issues ( all lights going off on dash, carbon buildup in injectors). completed carbon cleaning at dealership. At 44,831 same lights went off again, carbon buildup seen, faulty injectors replaced at dealership. Issues continued at 56,649 where carbon cleaning took place again for issue at dealership. at 86,606 check engine lights returned with jumping, faulty injectors replaced again and a cleaning was performed at dealership. at 113,791 miles, issues came up again. Dealership cleaned again with carbon cleaner. American Honda contacted again after last dealership visit #15755510 with American Honda rep stating there is no solution at this point per Honda engineers.

Filed Aug 27, 2025 · Electrical, Fuel system · CA

Vehicle has less than 16k miles over 6 years of ownership. One day, upon starting the car, multiple warning lights, including check engine light, appeared. Dealer stated after diagnostic that issue is due to misfire in one cylinder due to carbon buildup. This is a known issue with this model, and several repair bulletins have been made about this specific issue. Certain VINs were given an extended warranty to fix this problem, but despite having this exact issue and my VIN being mentioned in the repair bulletin, my car is not covered, forcing me to pay out of pocket for this known issue. Car is deemed not safe to drive by dealer until issue is remedied.

Filed Feb 18, 2025 · Engine, Fuel system · WA

All warning lights cycle through on vehicle dashboard after turning on vehicle. Vehicle was taken to Honda Auto Service Center, where issue is diagnosed as Carbon Buildup, causing misfires. Error Diagnostic Code is one of P0300 - P0304. After maintenance, error clears out. However, there is a Honda Service Bulletin 23-042 which provides a warranty extension for Honda Fits of the same year, make, and model with the same issue, which my vehicle's VIN was not included as eligible. Issue of carbon buildup causing misfires may apply to other VIN ranges than in that bulletin, as accounted by the federal safety agency ID #11462041, #11490506, #11549767, and #11593466

Filed Oct 23, 2022 · Fuel system · VA

November 2021 vehicle exhibits rough idle, multiple dashboard warning lights/messages come on with mileage at approximately 13,000 miles. Driver feels unsafe operating vehicle, concerned about engine stall during highway driving. Dealer service center performs intake valve cleaning of carbon buildup and update to software under warranty. Within twelve months, October 2022, vehicle exhibits similar rough idle, multiple dashboard warning lights/messages come on with mileage at approximately 20,000 miles. Driver feels unsafe operating vehicle, concerned about engine stall during highway driving. Dealer service initiated again.

Filed Oct 18, 2022 · Fuel system · MD

4 warning lights appeared 10/11/2022 (VSA, Engine, EPS and TPMS) The next day a local mechanic found code PO302. Misfire on cylinder no 2. Recommended take car to dealer for warranty work related to fuel injectors. Honda dealer found same code PO302 on 10/18/22 and instructed car needs a Walnut Blast, $700, not covered by extended powertrain warranty. The Honda Fit is known to have problems with fuel injectors, is at risk for stalling and the repair should be covered under the warranty.

Filed Oct 7, 2022 · Fuel system · CA

My Fit was purchased in May of 2019. On October 2022, all warning lights (tpms, check engine, lane assist, etc) suddenly turned on when the vehicle was turned on. The car was taken to the same Honda dealer where it purchased and the service department determined the problem to be a cylinder misfire (P0303, cylinder #3). Since I immediately took the vehicle to be serviced, I was able to avoid a likely engine stall that other Fit owners have been experiencing. My vehicle has had all of its required and recommended maintenance performed on time at the same Honda dealer where it was purchased, including replacing the fuel pump at 15k miles and performing decarb service at 20k miles. Even though my Fit was maintained to the exact specifications Honda required, the car still had this fuel system failure which the service department was unable to explain nor were they willing to comp despite having an extended warranty (also purchased at dealer). This error code is the same problem that triggered a service bulletin on all previous model years which Honda covered but has not done so for this model year. I spoke with Honda Customer Service department (1‑800‑999‑1009, option 1, 6, 5) and their warranty department but neither were willing to help because it was beyond the 3yr/36k coverage and was not covered by the extended warranty.

Filed Jul 21, 2022 · Engine, Fuel system · GA

Fuel Injector failure in under 35,000... There is a misfire from one of the fuel injectors leading to a replacement of the entire system.