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Home >> Hummer >> 2009 >> H3 Alpha >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 5.3L - DTC P0315 To DTC P064A >> DTC P0451-P0454 >> Circuit/System Verification
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Circuit/System Verification

  1. Remove the fuel cap.
  2. Ignition ON, engine OFF.
  3. Observe the Fuel Tank Pressure Sensor parameter with a scan tool.
  4. The FTP Sensor parameter should be 1.3-1.7 V.
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