p0303
Easy Fix
Honda · SUVs
Cylinder 3 Misfire Detected
Quick Answer
Error code P0303 on your Honda SUVs means: Cylinder 3 Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
RW1RW3RW5RV1CR-V EX 2024CR-V EX-L 2024CR-V Hybrid Sport 2024CR-V Hybrid Sport Touring 2024CR-V Hybrid Sport-L 2024CR-V LX 2024CR-V Sport 2024CR-V Sport Touring 2024HR-V EX-L 2024HR-V LX 2024HR-V Sport 2024Passport EX-L 2024Passport Sport 2024Passport Touring 2024Passport TrailSport 2024Pilot EX 2024Pilot EX-L 2024Pilot Elite 2024Pilot LX 2024Pilot Touring 2024Pilot TrailSport 2024YG7YA7ZD1RZ1
Likely Causes
How to Fix It
1
Remove and inspect the cylinder 3 spark plug for wear, deposits, or incorrect gap; replace if needed
2
Swap the ignition coil from cylinder 3 with another cylinder, clear codes, and monitor to see if misfire follows the coil
3
Test the cylinder 3 fuel injector for proper resistance and verify it clicks when activated
4
Check for vacuum leaks near the cylinder 3 intake port using carb cleaner or a smoke machine
5
Perform a compression test on cylinder 3 and compare to other 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 or Denso OEM-spec)
Ignition coil
Fuel injector
Intake manifold gasket
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