P1409 – EGR Vacuum Regulator Circuit Fault (Ford)

Description

P1409 Ford indicates a fault in the EGR vacuum regulator solenoid circuit.

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Symptoms

  • Rough idle
  • Hesitation
  • High emissions

Causes

  • Failed EVR solenoid
  • Vacuum leaks
  • Wiring faults

Diagnosis

  • Check EVR resistance
  • Inspect vacuum lines
  • Test EGR control

Repair

  • Replace EVR solenoid
  • Repair wiring
  • Fix vacuum leaks

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