Service Bulletin - The MIL comes on with DTC P0300 (random misfire detected) or P0301âP0304 (cylinder misfire detected) due to carbon buildup on the intake valves may be affecting combustion.
full bulletin at NHTSA ↗2020 Honda Fit engine problems
moderate Owners of the 2020 Honda Fit have filed 5 NHTSA complaints about the engine at roughly $3,100 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See engine across all vehicles →
Complaints
5
Recalls
0
Avg fix
$3,100
| Model year | engine complaints |
|---|---|
| 2016 Fit | 4 |
| 2017 Fit | 6 |
| 2018 Fit | 12 |
| 2019 Fit | 12 |
| 2020 Fit (this page) | 5 |
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2022 Accords, CR-Vs, Odysseys, Passports, Pilots, Ridgelines, 2020 Fits, 2020-2021 Civic Hatchbacks, 2020-2023 Civic Sedans/Coups with a customer complaint of the Check Engine Light (CEL) on & the DTC P0087 (Fuel Rail Pressure Too Low [Loss of Fuel Pressure]) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start & stumble in conjunction with CEL. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
full bulletin at NHTSA ↗Dealer Message - American Honda Motor Co., Inc. (AHM) is investigating certain 2020-2022 Accords, CR-Vs, Odysseys, Passports, Pilots, Ridgelines, 2020 Fits, 2020-2021 Civic Hatchbacks, 2020-2023 Civic Sedans/Coups with a customer complaint of the Check Engine Light (CEL) on & the DTC P0087 (Fuel Rail Pressure Too Low [Loss of Fuel Pressure]) stored. In some cases, the customer may also experience such conditions as engine hard to start, no start or start & stumble in conjunction with CEL. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
full bulletin at NHTSA ↗"Service news article - When diagnosing a Fit within the above VIN range with a misfire complaint, start by doing service bulletin, 21-007 (Carbon Buildup with Misfire DTCs) instead of replacing fuel injectors. These vehicles use an improved injector design that addresses the failures that may have occurred in previous model years. In fact, fuel injectors within the above VIN range with misfire complaints were collected and found to have no defects that required part replacement. Replacing those injectors may have reduced the number of misfires temporarily, but most likely didnât address the actual cause of the misfire. The recommended repair for these vehicles is to do the intake valve cl
full bulletin at NHTSA ↗Service bulletin - The MIL comes on with DTC P0300 (random misfire detected) or P0301âP0304 (cylinder misfire detected). Carbon buildup on the intake valves may be affecting combustion.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
What owners are reporting 4 most recent
Over the summer, vehicle lit up all warning lights. Like many others was informed the system needed deep carbon cleaning. There is a tsb for this problem but Honda corporate said it is regular maintenance and warranty does not cover. I have owned the car since January. If other years are covered, why not the 20?
While driving multiple error lights came on. I took my car in and they said it was carbon build up due to "bad gas." They cleaned it and it has been working fine. However, this is an acknowledged problem with the 2018 and 2019 Honda Fit. Honda actually extended the warranty for those years to cover those repairs. My car only had 22156 miles on it. And the error I experienced is the exact error…
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…
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?
Had engine trouble with your 2020 Honda Fit?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2020 Honda Fit?
It's a documented issue but not catastrophic. 5 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2020/Honda/Fit.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.