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Home >> Buick >> 2015 >> Verano Leather >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls And Fuel - 2.0L (LHU) - DTC P025A To DTC P2635 Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0449, P0498, or P0499: Evaporative Emission (EVAP) Vent Solenoid Valve >> Circuit/System Verification

Circuit/System Verification

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

An audible click may be heard when performing step 2 below.

  1. Ignition ON.
  2. Verify the following control circuit status parameters while command the EVAP Vent Solenoid Valve to Not Venting and Venting with a scan tool:
    • EVAP Vent Solenoid Valve Control Circuit Open Test Status
    • EVAP Vent Solenoid Valve Control Circuit Low Voltage Test Status
    • EVAP Vent Solenoid Valve Control Circuit High Voltage Test Status
    • If Malfunction is displayed 

      Refer to Circuit/System Testing.

    • If Malfunction is not displayed 
  3. 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.
  4. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

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