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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 42 (Engine Control System Diagnosis - 2.0L (2 Of 3) (Except HEV)) >> DTC P0442: Evaporative Emission System-Leak Detected (Small Leak) >> System Inspection >> Determine whether the cause of leakage is Canister or CCV

Determine whether the cause of leakage is Canister or CCV

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect CCV from the Canister
  2. Block the hole of the port on the CCV with appropriate plug
  3. Check for vacuum leak through the Canister line by operating vacuum pump and gauge

    Specification:  No Leakage

    Fig 1: Checking Vacuum Leak Through Canister Line By Operating Vacuum Pump And Gauge
    G11991781Courtesy of HYUNDAI MOTOR AMERICA
  4. Does a leak exist?

    YES 

    • Visually check fine crack of the canister: Replace canister if there is crack
    • Check the status of clamp & "O" ring of the coupler and hose connected to canister is torn out: Replace part if found leakage.

    NO 

    • Substitute with a known-good CCV and check for proper operation. If the problem is corrected, replace CCV and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.