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P0308 Powertrain

Cylinder 8 Misfire Detected

Misfires concentrated on cylinder 8. A cylinder-specific code points away from shared causes (fuel pressure, MAF) toward components dedicated to that cylinder — coil, spark plug, injector, compression.

Affected components

  • Ignition coil
  • Spark plug
  • Fuel injector

Common causes

  • High likelihood: Ignition coil failed

Possible symptoms

  • Check engine light on or flashing
  • Rough idle and uneven running
  • Power loss, hesitation under acceleration
  • Increased fuel consumption
  • Possible smell of unburned fuel from exhaust

Diagnostic notes

  • The malfunction indicator lamp may illuminate
  • This code can affect emissions
  • A drive cycle may be required after repair

Related codes

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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