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Home >> Pontiac >> 2008 >> G8 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 3.6L - DTC P0300 To DTC P1014 >> DTC P0455 or P0497 >> Component Testing
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Component Testing

  1. Seal the EVAP system using the EVAP Purge/Seal function with a scan tool.
  2. Pressurize the EVAP system to 5 inches H20.
  3. Compare the Fuel Tank Pressure sensor parameter with a scan tool to the J 41413-200  pressure/vacuum gage. See Special Tools . The scan tool FTP sensor parameter should be within 1 inch H20 of the pressure/vacuum gage.
  4. Command the EVAP vent valve open with a scan tool.
  5. The scan tool Fuel Tank Pressure parameter should be 0 inches H20.
    • If the FTP sensor parameters do not respond to the change in pressure, replace the FTP sensor.
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