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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 6.2L - DTC P0300 To DTC P1175 >> DTC P0451, P0452, P0453, or P0454 >> Circuit/System Verification

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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