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P1366 – Ignition Coil Primary Circuit Fault (Cylinder 6)

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Symptoms

  • Misfire
  • Rough idle
  • Weak acceleration

Causes

  • Faulty coil
  • Wiring damage
  • Connector issue

Diagnosis

  • Measure voltage
  • Inspect wiring
  • Test coil

Repair

  • Replace coil
  • Repair wiring
  • Clean connector
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