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Home >> Hummer >> 2008 >> H2 4D Utility Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 6.2L - DTC P0010 To DTC P0232 >> DTC P0191 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON, vary the engine speed with the accelerator pedal. Verify that DTC P0191 does not set as current.
    • If the DTC sets as current, test the fuel line pressure sensor signal circuit for a high resistance. If the circuit tests normal, replace the fuel line pressure sensor.
  2. If the DTC does not reset in the FPCM, the system is OK. Do not replace the FPCM.
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