Hyundai Elantra AD Quiz
Emission Control System

Repair Procedures

In this manual: Emission Control System
General Information — 9Engine Mechanical System — 84Engine Electrical System — 60Emission Control System — 24Engine Control System/Fuel System — 90Automatic Transmission — 92Drive Shaft and Axle — 20Suspension System — 31Steering — 20Restraints — 50Brake System — 63Body (Interior and Exterior) — 214Body Electrical System — 221Heating, Ventilation, and Air Conditioning — 71
4steps
~24min
2/5difficulty
Done 0 of 4

Inspection

  1. Disconnect the vapor hose from the PCV valve, then remove the PCV valve.
  2. Reconnect the PCV valve to the vapor hose.
  3. Run the engine at idle, then place your finger over the open end of the PCV valve and check that vacuum is felt in the intake manifold.
    • The piston inside the PCV valve will move back and forth due to the vacuum.
  4. If vacuum is not felt, check the operation of the PCV valve. If it operates properly, clean or replace the vapor hose.

Test yourself

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