Emission Control System Visual Inspection Procedures - General Information

• * Please Read This First *
• Emission Control Labels
• Emission Control Visual Inspection
  • Notes
  • Positive Crankcase Ventilation (PCV)
  • Thermostatic Air Cleaner (TAC)
  • Fuel Evaporative System (EVAP)
  • Catalytic Converters
    • Oxidation Catalyst (OC)
    • Three-Way Catalyst (TWC)
    • Three-Way Catalyst + Oxidation Catalyst (TWC + OC)
  • Fill Pipe RESTRICTOR (Fr)
  • Exhaust Gas RECIRCULATION (EGR) System
    • Single Diaphragm EGR Valve
    • Dual Diaphragm EGR Valve
    • Positive Backpressure EGR (BP/EGR) Valve
    • Negative Backpressure EGR (BP/EGR) Valve
    • Digital EGR Valve
    • Integrated Electronic EGR Valve
  • Spark Controls (SPK)
  • Air Injection System (AIS)
    • Air Pump Injection System (AP)
    • Pulsed Secondary Air Injection (PAIR) System
  • Oxygen Sensor (O2)
  • Computerized Engine Controls (CEC)
  • Early Fuel Evaporation (EFE)
  • Emission Maintenance Reminder Light (EMR) (If Equipped)
  • Malfunction Indicator Light (Mil)