981 · Engine

P0306

Cylinder 6 Misfire Detected

HIGH SEVERITY

Misfire isolated to cylinder 6 (Bank 2).

SYMPTOMS

  • Flashing or steady check-engine light
  • Rough idle
  • Hesitation
  • Vibration

LIKELY CAUSES

  • Faulty coil or plug on cylinder 6
  • Failed injector
  • Low compression
  • Local intake leak

DIAGNOSIS STEPS

  • Swap coil and plug to an adjacent cylinder; see if misfire follows
  • Test injector
  • Compression/leak-down test

RELATED PARTS

  • Ignition coil
  • Spark plug
  • Fuel injector
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