P1406 – EGR Solenoid Circuit Fault (Nissan)

Description

The ECM detected a malfunction in the EGR solenoid circuit.

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Symptoms

  • Hesitation
  • Poor acceleration

Causes

  • Open circuit
  • Shorted wiring
  • Solenoid failure

Diagnosis

  • Check wiring continuity
  • Test solenoid
  • Inspect connectors

Repair

  • Repair wiring
  • Replace solenoid