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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (5 Of 5)) >> Diagnostic Information and Procedures >> DTC P228A or P228B >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition - On/Vehicle - In Service Mode
  2. Verify there are no DTCs set related to the following component/system: Fuel System
    • Go to next step: If a related DTC is not set 
  3. Verify the following conditions do not exist:
    • If a condition exists 

      Repair or replace as necessary

    • Go to next step: If no condition exists 
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC is not set 
  5. All OK.