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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 125 (Engine Control System Diagnosis (1 Of 2) (HEV)) >> DTC P0456: Evaporative Emission System-Leak Detected (Very Small Leak) >> W/Harness Inspection >> PCSV Inspection

PCSV Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Ignition "OFF"
  2. Disconnect the hose leading from the PCSV to intake manifold at intake manifold.
  3. Using a vacuum pump, apply vacuum to the manifold side of the vacuum hose and verify PCSV holds vacuum.
  4. Ignition "ON" & Engine "OFF"
  5. Install GDS and select "Canister Purge Valve" on the Actuation Test mode.
  6. Activates "Canister Purge Valve" by clicking "Start" icon.
  7. Verify PCSV release vacuum while valve is activating (should hear a faint click from PCSV)
  8. Repeat this procedure 4 or 5 times to ensure PCSV reliability.

    Specification 

    Test Condition Specification
    PCSV is On (should hear a faint click from PCSV) Holds vacuum
    PCSV is OFF Release vacuum
  9. Is PCSV working properly?

    YES 

    • Go to next step as below.

    NO 

    • Verify arrow on PCSV is pointing towards intake manifold. If it is not, reverse installation. Reinstall as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      If OK, thoroughly check fuel vapor hoses and hose clamps between PCSV and intake manifold. Repair as necessary. If OK, test with a new PCSV and check for proper operation. If problem is corrected, replace PCSV and go to "VERIFICATION OF VEHICLE REPAIR " procedure.