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Code
P0300
Ignition / Engine

Raté d’allumage aléatoire / sur plusieurs cylindres

Le calculateur détecte des ratés sur plusieurs cylindres, souvent un problème partagé d’allumage, de carburant ou d’air.

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Most likely causes

  1. Bougies ou bobines d’allumage
  2. Fuite d’air / admission
  3. Pression de carburant basse ou injecteurs bouchés
  4. Défaut EGR
  5. Compression faible

Symptoms you may notice

  • Rough idle
  • Shaking / hesitation
  • Loss of power
  • Flashing check engine light

Checks to run

  1. Read live misfire counts per cylinder
  2. Inspect plugs, coils and wiring
  3. Check fuel pressure and intake vacuum
  4. Compression test

Tools you may need

OBD-II scanner Compression tester Fuel pressure gauge Multimeter
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

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