Code
P0303
Ignition / Engine
Raté d’allumage détecté — cylindre 3
Le cylindre 3 raté. Isolez en échangeant les pièces.
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Most likely causes
- Bougie ou bobine défectueuse cyl. 3
- Injecteur défectueux
- Fuite d’air
- Compression faible
Symptoms you may notice
- Rough idle
- Shaking
- Check engine light
- Loss of power
Checks to run
- Swap coil/plug to another cylinder
- Test injector and compression on cyl 3
Tools you may need
OBD-II scanner
Multimeter
Compression tester
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.