How do you test the purge control valve?

To test the purge control valve, start by visually inspecting it for any signs of damage or blockages. Then, using a scan tool, check for any diagnostic trouble codes (DTCs) related to the evaporative emission system. Next, apply vacuum to the valve using a hand-held vacuum pump; it should hold vacuum if functioning properly. Finally, you can also observe the valve operation while the engine is running to ensure it opens and closes as expected during the purge cycle.