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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (Engine Controls And Fuel - 1.4L (LUJ LUV) - DTC P0300 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0446: Evaporative Emission (EVAP) Vent System >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC P0443 is not set.
    • If the DTC is not set 
  3. Ignition OFF, remove the fuel tank filler cap. Ignition ON.
  4. Verify the scan tool Fuel Tank Pressure Sensor parameter is between 1.3-1.7 V.
    • If not between the 1.3-1.7 V 

      Refer to P0452, P0453 within DTC P0451-P0454 .

    • If between the 1.3-1.7 V 
  5. Install the fuel tank filler cap. Engine idling at operating temperature for 5 min.
  6. Verify the scan tool Fuel Tank Pressure Sensor parameter does not increase to greater than 2.5 V when commanding the EVAP Purge Solenoid Valve to 50%.
    • If greater than 2.5 V 

      Refer to Circuit/System Testing.

    • If 2.5 V or less 
  7. 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 Circuit/System Testing.

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