P0303 on HONDA RIDGELINE — Cylinder 3 Misfire Detected

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

"P0303 indicates: Cylinder 3 Misfire Detected. This is a ignition system code. 2 HONDA RIDGELINE owners have reported this to NHTSA."

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

"Based on 2 NHTSA reports, the most commonly cited components are: Engine,Fuel/Propulsion System, Engine. These percentages are based on the component field in owner complaints."

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

"Of 2 NHTSA reports for this code on HONDA RIDGELINE, 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 RIDGELINE 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 RIDGELINE

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.

2 HONDA RIDGELINE owners have reported this issue to NHTSA across model years 2021-2022. Most reports come from the 2021, 2022 model years. The most commonly reported component is Engine,Fuel/Propulsion System (50.0% of reports).

Real HONDA RIDGELINE Owner Reports

Source: NHTSA Complaints Database

"Upon exiting or entering the highway, the truck loses power and will not accelerate. This happens after multiple hours of highway driving and seems to only happen when the temperature is near or below freezing. The Check Engine Light (CEL) comes on and is flashing."

— 2021 HONDA RIDGELINE owner · ENGINE,FUEL/PROPULSION SYSTEM · Filed 11/06/2021

"The CEL flashed 2 days earlier, I immediately pulled to the side of the road and turned the vehicle off, suspecting it may be a misfire. Restarted the vehicle and all seemed fine. After arriving home i plugged in my scanner to check for a code. No codes were found."

— 2022 HONDA RIDGELINE owner · ENGINE · Filed 01/14/2026

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

📊 Complaint Trend by Model Year

1

'21

1

'22

Common Causes on HONDA RIDGELINE

Based on NHTSA complaint component analysis for this vehicle.

ENGINE,FUEL/PROPULSION SYSTEM 50%

ENGINE 50%

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 RIDGELINE? ▾

P0303 indicates: Cylinder 3 Misfire Detected. This is a ignition system code. 2 HONDA RIDGELINE owners have reported this to NHTSA.

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

Based on 2 NHTSA reports, the most commonly cited components are: Engine,Fuel/Propulsion System, Engine. These percentages are based on the component field in owner complaints.

Is P0303 serious on my HONDA RIDGELINE? ▾

Of 2 NHTSA reports for this code on HONDA RIDGELINE, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my HONDA RIDGELINE 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.