P1483 – Secondary Air Injection Valve Stuck Closed (Nissan)

Description

The ECM detected a secondary air injection valve stuck closed.

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Symptoms

  • High emissions
  • Poor acceleration

Causes

  • Valve sticking
  • Carbon buildup
  • Vacuum issue

Diagnosis

  • Inspect valve
  • Check vacuum lines
  • Scan SAI data

Repair

  • Clean valve
  • Replace valve