DTC code
P0303
Cylinder 3 Misfire Detected
Technical guide
Symptoms
- Cylinder 3 misfire
- rough running
- check engine light
Probable causes
- Cylinder 3 misfire
- ignition coil
- spark plug
- injector
- compression
Diagnostic steps
- Swap coil.
- Replace spark plug.
- Test injector.
- Compression test.
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
Models most reported with this code (NHTSA)
Ford Escape 57Ford Edge 27Ford Fusion 21Honda CR-V 17Honda Accord 15Honda Odyssey 14Kia Soul 13Kia Sorento 8
Count of distinct owner complaints mentioning the code. US data — same engines, same failures.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on P0303
Nothing confirmed yet for this code. No guess is offered on purpose.
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