P1403 – EGR Valve Position Sensor Fault (Nissan)

Description

The ECM detected a malfunction in the EGR valve position sensor.

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Symptoms

  • Hesitation
  • Poor acceleration

Causes

  • Sensor failure
  • Valve sticking
  • Wiring issue

Diagnosis

  • Check sensor voltage
  • Inspect valve
  • Scan EGR data

Repair

  • Replace sensor
  • Repair wiring