P1507 – Idle Air Control Valve Underspeed (Nissan)

Description

The ECM detected idle speed lower than expected.

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Symptoms

  • Low idle
  • Stalling

Causes

  • Valve sticking
  • Airflow restriction
  • Wiring issue

Diagnosis

  • Inspect valve
  • Check airflow
  • Scan idle data

Repair

  • Clean valve
  • Repair wiring

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