KIA Niro: Emission Control System

Components Location

  1. PCV Valve
  2. Canister
  3. Purge Control Solenoid Valve (PCSV)
  4. Fuel Tank Pressure Sensor (FTPS)
  5. Fuel Level Sensor (FLS)
  6. Fuel tank air Filter
  7. Catalytic converter (WCC)
  8. Gasoline Particulate Filter (GPF)

PCV Valve PCV Valve

Canister Canister

Purge Control Solenoid Valve (PCSV) Purge Control Solenoid Valve (PCSV)

Fuel Tank Pressure Sensor (FTPS) Fuel Tank Pressure Sensor (FTPS)

Fuel Level Sensor (FLS) Fuel Level Sensor (FLS)

Fuel tank air Filter Fuel tank air Filter

Catalytic converter (WCC) Catalytic converter (WCC)

Gasoline Particulate Filter (GPF) Gasoline Particulate Filter (GPF)


Emissions Control System consists of three major systems.

  • The Crankcase Emission Control System prevents blow-by gas from releasing into the atmosphere.

    This system recycles gas back into the intake manifold (Closed Crankcase Ventilation Type).

  • The Evaporative Emission Control System prevents evaporative gas from releasing into the
    atmosphere. This system burns gas at appropriate engine operating condition after gathering it in
    the canister.
  • The Exhaust Emission Control System converts the three pollutants (hydrocarbons (HC), carbon
    monoxide (CO), and oxides of nitrogen (NOx)) into harmless substances by using the 3-way
    catalytic converter.

Schematic Diagram



Crankcase Emission Control System


 Crankcase Emission Control System

Schematic Diagram Repair procedures Inspection After disconnecting the vapor hose from the PCV valve, remove the PCV valve. Reconnect the PCV valve to the vapor hose. Run the engine at idle, then put a finger over the open end of the

 Positive Crankcase Ventilation (PCV) Valve Repair procedures | Canister Repair procedures

Removal Disconnect the vapor hose (A). Remove the PCV valve (B). Inspection Insert a thin stick (A) into the PCV valve (B) from the threaded side to check the plunger movement. Warning If the plunger does not move (PCV


 Removing and storing the spare tire

Jack and tools Jack handle Jack Wheel lug nut wrench Removing and storing the spare tire Operation Remove the luggage board cover (1). Turn the tire hold-down wing bolt counterclockwise. Store the tire in the

 Water Temperature Control Assembly

Removal and Installation Water Temperature Control Assembly Disconnect the battery negative terminal.  Loosen the drain plug, and drain the engine coolant. Remove the reservoir cap to help drain the coolant faster. (Refer to Cool