EV Diagnostics
Source-backed diagnostic reference

P1409 EV diagnostic code

EGR Vacuum System Leak

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

Reference definitions

  • BUICK: EGR Vacuum System Leak Source
  • CADILLAC: EGR Vacuum System Leak Source
  • CHEVY: EGR Vacuum System Leak Source
  • CHRYSLER: EGR Vacuum System Leak Source
  • FORD: EGR Vacuum Regulator Circuit Malfunction Source
  • GM: EGR Vacuum System Leak Source
  • GMC: EGR Vacuum System Leak Source
  • JAGUAR: Exhaust Gas Recirculation Valve Circuit Source
  • LINCOLN: EGR Vacuum Regulator Circuit Malfunction Source
  • MAZDA: EGR Vacuum Regulator Solenoid Circuit Source
  • MERCURY: EGR Vacuum Regulator Circuit Malfunction Source
  • OLDSMOBILE: EGR Vacuum System Leak Source
  • OTHER: EVR Control Circuit Malfunction Source
  • PLYMOUTH: EGR Vacuum System Leak Source
  • PONTIAC: EGR Vacuum System Leak Source
  • SATURN: EGR Vacuum System Leak Source
  • VOLKSWAGEN: Tank Ventilation Valve Electrical Malfunction Source

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