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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 364 (Engine Controls And Fuel - 5.3L, 6.0L & 6.2L - DTC P0443 Through DTC P3449 And Troubleshooting) >> Diagnostic Information and Procedures >> Fuel Composition Diagnosis >> Circuit/System Verification

Circuit/System Verification

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  1. Record the scan tool Fuel Alcohol Content.
  2. Measure the ethanol content with a fuel sample from the fuel rail using the J 44175  Tester. The difference between the measured ethanol content and the scan tool Fuel Alcohol Content should be less than 17 percent.
    • If not within the specified range, continue with Circuit/System Testing.
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