Circuit/System Verification

Ignition ON.
Verify DTC P0443 is not set.
- If the DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If the DTC is not set
Ignition OFF, remove the fuel tank filler cap. Ignition ON.
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
Install the fuel tank filler cap. Engine idling at operating temperature for 5 min.
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
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
All OK.