p0301
Easy Fix
Honda · Sedans
Cylinder 1 Misfire Detected
Quick Answer
Error code P0301 on your Honda Sedans means: Cylinder 1 Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
CV3CV4FC1FC4FE1FL5ZC5Accord EX 2024Accord EX-L 2024Accord Hybrid EX-L 2024Accord Hybrid Sport 2024Accord Hybrid Touring 2024Accord LX 2024Accord Sport 2024Accord Touring 2024Civic EX 2024Civic Hybrid Sport 2025Civic Hybrid Sport Touring 2025Civic LX 2024Civic Si 2024Civic Sport 2024Civic Touring 2024Civic Type R 2024ZE4
Likely Causes
How to Fix It
1
Remove and inspect the spark plug for cylinder 1; replace if worn, fouled, or gapped incorrectly
2
Swap the ignition coil from cylinder 1 with another cylinder and clear codes to see if misfire follows
3
Test the fuel injector on cylinder 1 for proper resistance and spray pattern
4
Perform a compression test on cylinder 1 and compare to adjacent cylinders
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Spark plug (NGK ILZKR7B11S or equivalent)
Ignition coil
Fuel injector
Spark plug boot
Related Error Codes