P0303 on HONDA FIT — Cylinder 3 Misfire Detected

Q: "What does P0303 mean on a HONDA FIT?"

"P0303 indicates: Cylinder 3 Misfire Detected. This is a ignition system code. 5 HONDA FIT owners have reported this to NHTSA."

Q: "What are the most common causes of P0303 on HONDA FIT?"

"Based on 5 NHTSA reports, the most commonly cited components are: Fuel/Propulsion System, Electrical System,Unknown Or Other,Fuel/Propulsion System, Engine,Fuel/Propulsion System. These percentages are based on the component field in owner complaints."

Q: "Is P0303 serious on my HONDA FIT?"

"Of 5 NHTSA reports for this code on HONDA FIT, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my HONDA FIT shows P0303?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0303 Means on Your HONDA FIT

P0303 is a diagnostic trouble code indicating: Cylinder 3 Misfire Detected. This code relates to the ignition system system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

5 HONDA FIT owners have reported this issue to NHTSA across model years 2015-2019. Most reports come from the 2015, 2018 model years.

Real HONDA FIT Owner Reports

Source: NHTSA Complaints Database

"Before I parked, all was fine and the car felt safe, two hours later, I start the car and it has four warning lights on. Now I don't have Hill Start Assist and the car feels like it might 'go out' on me, I think something will keep it from running soon."

— 2015 HONDA FIT owner · ELECTRICAL SYSTEM,UNKNOWN OR OTHER,FUEL/PROPULSION SYSTEM · Filed 06/28/2023

"P0303 misfire cylinder 4; checked live data, all cylinders misfiring. recommended to replace all fuel injectors and fuel pipe due to "known issues with direct fuel injectors" as stated by honda dealership. car idles roughly."

— 2015 HONDA FIT owner · ENGINE,FUEL/PROPULSION SYSTEM · Filed 12/18/2019

"After parking and returning to vehicle, on start up, multiple check engine lights went off. code was read as p0303 engine cylinder 3 misfire. car ~8000 miles, on taking to dealership was told extreme carbon buildup had caused misfires. car was returned, functioned for a month."

— 2018 HONDA FIT owner · FUEL/PROPULSION SYSTEM · Filed 10/19/2019

"Tl* the contact owns a 2018 honda fit. while attempting to drive the vehicle, the anti-lock brake, tire pressure monitoring system, hill access, lane departure, brake assist crash, and power steering warning indicators illuminated."

— 2018 HONDA FIT owner · ELECTRICAL SYSTEM · Filed 07/22/2019

"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."

— 2019 HONDA FIT owner · FUEL/PROPULSION SYSTEM · Filed 10/06/2022

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

2

'15

2

'18

1

'19

Common Causes on HONDA FIT

Based on NHTSA complaint component analysis for this vehicle.

FUEL/PROPULSION SYSTEM 40%

ELECTRICAL SYSTEM,UNKNOWN or OTHER,FUEL/PROPULSION SYSTEM 20%

ENGINE,FUEL/PROPULSION SYSTEM 20%

ELECTRICAL SYSTEM 20%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0303 mean on a HONDA FIT? ▾

P0303 indicates: Cylinder 3 Misfire Detected. This is a ignition system code. 5 HONDA FIT owners have reported this to NHTSA.

What are the most common causes of P0303 on HONDA FIT? ▾

Based on 5 NHTSA reports, the most commonly cited components are: Fuel/Propulsion System, Electrical System,Unknown Or Other,Fuel/Propulsion System, Engine,Fuel/Propulsion System. These percentages are based on the component field in owner complaints.

Is P0303 serious on my HONDA FIT? ▾

Of 5 NHTSA reports for this code on HONDA FIT, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my HONDA FIT shows P0303? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.