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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 P0449: Evaporative Emission System-Vent Valve/Solenoid Circuit >> System Inspection

System Inspection

WARNING: This page is about a different variant/trim than selected.

■ Canister Air-Filter inspection 

  1. Disassemble the Canister Air-Filter and hose from their respective positions.
  2. Check the Canister air-filter for contamination.
  3. Is Canister Air-Filter contaminated with dust?

    YES 

    NO 

    • Go to next step as below.

■ Canister Close Valve (CCV) Line Inspection 

  1. Reconnect all EVAP hardware that was previously disconnected.
  2. Disconnect hose connecting Canister Closing Valve (CCV) to canister.
  3. IG "ON".
  4. Blow air to the canister side of the valve and verify air escapes to the air filter side.
  5. Install GDS and select "CANISTER CLOSE VALVE" on the "Actuation Test" mode.
  6. Activates "CANISTER CLOSE VALVE" by clicking "START" icon.
  7. Blow air into hose and verify air does not escape.
  8. Repeat this procedure 4 or 5 times to ensure CCV reliability.
  9. Is CCV working properly?

    YES 

    • Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • If CCV was stuck closed, inspect all lines and canister for liquid fuel. Replace any contaminated components and blow out lines. Check CCV for contamination, deterioration, or damage. 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.
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