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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 247 (Engine Control System & Fuel - 4.8L, 5.3L, 6.0L, Or 6.2L - DTC P0010 To DTC P0230) >> DTC P0191 >> Circuit/System Verification

Circuit/System Verification

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IMPORTANT: Repair all other driveability DTCs or problems before performing this diagnostic.

Engine ON with the engine idling at normal operating temperature, the Fuel Rail Pressure Sensor parameter should read between 296.4-310.3 kPa (43-45 psi).

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