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Home >> Chevrolet >> 2006 >> Optra5 LS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 2.0L (L34 GMDAT) - DTC P0404 To DTC P2110 >> DTC P0455 >> Circuit/System Verification

Circuit/System Verification

  1. Verify the following conditions do not exist in the EVAP system:
    • Loose, incorrect, missing, or damaged fuel fill cap
    • Loose, missing, or damaged service port schrader valve
    • A damaged EVAP purge solenoid
    • Disconnected, incorrectly routed, kinked, or damaged EVAP pipes and hoses
    • A damaged EVAP vent valve or EVAP canister
    • If you find any of the above conditions, repair as necessary.
    2. IMPORTANT: Refer to the J 41413-200  Evaporative Emissions System Tester (EEST) operation manual for detailed instructions. See Special Tools .
  2. Remove the fuel fill cap. Connect the GE-41415-50  Fuel Tank Cap Adapter to the fuel tank filler neck. Connect the J 41413-200  EEST to the GE-41415-50  Fuel Tank Cap Adapter. See Special Tools .
  3. Calibrate the EEST Flow Meter to the correct leak orifice for the vehicle.
  4. Command the EVAP vent solenoid closed with a scan tool.
    5. IMPORTANT: Larger volume fuel tanks and/or those with lower fuel levels may require several minutes for the floating indicator to stabilize.
  5. Activate the EEST and compare the flow meter's stable floating indicator position to the red flag.
    • If the floating indicator is above the red flag, test for a leak in the EVAP system.
    • If the floating indicator is below the red flag, test for a blockage or restriction in the EVAP system.
  6. If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.
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