P1522 – Intake Manifold Runner Stuck Closed (Nissan)

Description

The ECM detected the intake manifold runner stuck in the closed position.

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Symptoms

  • Poor acceleration
  • Flat power

Causes

  • Actuator failure
  • Carbon buildup
  • Wiring issue

Diagnosis

  • Inspect actuator
  • Check wiring
  • Scan IMRC data

Repair

  • Clean runners
  • Replace actuator