On June 10th 2026, my 2020 Honda Fit EX-L with approximately 20,000 miles began misfiring while idle at a light. Error codes started appearing on my dash, no check engine light. Honda of Short Pump diagnosed a cylinder 2 misfire (DTC P0302) caused by a carbon buildup on the intake valves and quoted ~$1200 for valve cleaning. This is the identical failure mode described in Honda Service Bulletin 21-007, whose affected vehicles list includes 2015-2020 Honda Fits, and which Honda covers under warranty extension bulletin 23-042 for 10 years/150,000 miles - but only for 2018-2019 model years. My 2020 vehicle is excluded by VIN range despite an identical defect at far lower mileage. An engine that misfires and loses power in traffic is a safety hazard. American Honda case #16419709 is open. See related complaints 11462041, 11490506, 11549767, and 11593466 from other owners outside the covered VIN range.
2020 Honda Fit: misfire or rough idle
5 of the 38 complaints about the 2020 Honda Fit describe misfire or rough idle.
- owner complaints
- 5
- of this car's complaints
- 13%
- recalls
- 0
Misfire or rough idle by model year
What owners say
Carbon Buildup with Misfire DTCs. Honda published a service bulletin but is refusing to cover the necessary repair. We are paying out of pocket for the known issue that they have extended warranty coverage on for some other VINs but refuse to cover this one.
There is a carbon build-up in the engine causing for a misfire in the engine cylinders.
Vehicle had entire dash warning lights appear suddenly and had noticed a week prior a vibration/clicking when driving at higher speeds over 50mph. Took to dealer and was told vehicle has had misfires and fuel system was badly dirty and needed an immediate cleaning. Why are the 2020 Fit’s not included in the extended warrant on this as the 2018-2019’s are?
The contact owns a 2020 Honda Fit. The contact stated that after starting the vehicle, the warning lights remained illuminated along with the check engine warning light. The vehicle also experienced misfiring while driving at various speeds. The vehicle was taken to the local dealer who diagnosed that the fuel injectors were faulty and needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 9,623.
Service bulletins that may apply
- The MIL comes on with DTC P0300 (random misfire detected) or P0301–P0304 (cylinder misfire detected) due...
- Dealer Message
- Service news article
- The MIL comes on with DTC P0300 (random misfire detected) or P0301–P0304 (cylinder misfire detected)
- ServiceNews Article
- The MIL comes on with DTC P0300 (random misfire detected) or P0301-P0304 (cylinder misfire detected).
- Dealer Message
- ServiceNews Article
Related recalls
No recalls on record for this model year.
Questions about the 2020 Honda Fit misfire
Is misfire or rough idle a common problem on the 2020 Honda Fit?
5 of 38 owner complaints about the 2020 Honda Fit (13%) mention misfire or rough idle. The model year with the most reports is 2018.
Is there a recall or service bulletin for this on the 2020 Honda Fit?
There are 0 recalls and 11 service bulletins for the same area of the car. Check them below with your VIN.
VIN decoder
See the problems and recalls for an exact car
Buying a used 2020 Honda Fit?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history