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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 29 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0446 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0446: Evaporative Emission (EVAP) Vent System Performance >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
NOTE: Perform the Circuit/System Verification before proceeding with the Circuit/System Testing.
  1. Verify a blockage or restriction does not exist in the EVAP system components listed below.
    • Evaporative Emission Vent System Hoses
    • Evaporative Emission Canister
    • Evaporative Emission Vent Filter
    • If a condition exists 

      Repair or replace the component as necessary

    • If none of the conditions exist 
  2. Reconnect any previously disconnected EVAP hardware.
    NOTE: Refer to the GE-41413-A  operation manual for detailed instructions in Evaporative Emission Control System Diagnosis.
  3. Install the CH-48096  . Connect the GE-41413-A  to the CH-48096  .
  4. Turn the nitrogen/smoke valve on the GE-41413-A  to nitrogen.
  5. Use the remote switch to activate the GE-41413-A  and pressurize the fuel tank.
  6. Vehicle in Service Mode
  7. Verify the scan tool Fuel Tank Pressure Sensor parameter is 0 in H20 (0 kPa).
    • If not 0 in H20 

      Test for a blockage or a restriction in the EVAP vent hose or inlet. Repair or replace the component as necessary.

    • If 0 in H20 
  8. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
    • If the DTC sets 

      Refer to step 1 above.

    • If the DTC does not set 
  9. All OK.
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