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Home >> Chevrolet >> 2014 >> Spark LS, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.2L - DTC P0010 To DTC P0446 >> Diagnostic Information and Procedures >> DTC P0446 >> Circuit/System Verification

Circuit/System Verification

  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 voltage parameter is within 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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