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Home >> Cadillac >> 2006 >> STS Base, 3.6 7, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 3.6L - DTC P0342 To P0690 >> DTC P0455 >> Component Testing
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Component Testing

  1. Lower the EVAP purge canister to gain access to the EVAP vent inlet, and seal it, using a suitable plug or a plug from the J 41413-300  . See Special Tools .
  2. Pressurize the EVAP system to 5 inches H20 with a J 41413-200  . See Special Tools .
  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. Remove the plug from the EVAP vent valve inlet.
  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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