P1407 – EGR System Slow Response (Nissan)

Description

The ECM detected a slow response from the EGR system.

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Symptoms

  • Hesitation
  • Poor acceleration

Causes

  • Carbon buildup
  • Valve sticking
  • Wiring issue

Diagnosis

  • Check valve movement
  • Inspect wiring
  • Scan EGR data

Repair

  • Clean valve
  • Repair wiring