P1520 – Intake Manifold Runner Control Circuit (Nissan)

Description

The ECM detected a malfunction in the intake manifold runner control circuit.

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Symptoms

  • Poor acceleration
  • Hesitation

Causes

  • Actuator failure
  • Wiring issue
  • Vacuum leak

Diagnosis

  • Check actuator
  • Inspect wiring
  • Scan IMRC data

Repair

  • Replace actuator
  • Repair wiring