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P1546 – Intake Manifold Runner Control Sensor Range/Performance (Bank 1)

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Symptoms

  • Hesitation
  • Poor fuel economy

Causes

  • Faulty sensor
  • Wiring issue
  • Carbon buildup

Diagnosis

  • Read sensor data
  • Inspect wiring
  • Check IMRC movement

Repair

  • Replace sensor
  • Repair wiring
  • Clean IMRC
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