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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0010 To DTC P0442) >> Diagnostic Information And Procedures >> DTC P0068 Or P1101: Air Flow Performance >> Circuit/System Testing

Circuit/System Testing

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NOTE: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.
  1. Verify the integrity of the entire air induction system by verifying that none of the conditions listed below exist :
    • Any damaged, improperly installed, collapsed or restricted components
    • Loose clamps, cracks or other damage
    • An air flow restriction
    • Restricted air filter
    • Splits, kinks, leaks or improper connections at the vacuum hoses
    • Vacuum leaks at the intake manifold, MAP sensor and throttle body
    • Water intrusion
    • Any snow or ice buildup, in cold climates
    • Contamination of the MAF sensor element
    • Improper operation of the crankcase ventilation system - Refer to Crankcase Ventilation System Inspection/Diagnosis for further diagnosis.
    • Missing, restricted or leaking exhaust components - Refer to Symptoms - Engine Exhaust for further diagnosis.
    • If a condition is found 

      Repair or replace component as appropriate.

    • Go to next step : If no condition is found 
  2. Test the engine for a mechanical condition. Refer to Symptoms - Engine Mechanical for diagnosis.
    • If a condition is found 

      Repair or replace component as appropriate.

    • Go to next step : If no condition is found 
  3. All OK
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