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Home >> Chevrolet >> 2022 >> Tahoe PPV, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (3 Of 5)) >> Diagnostic Information and Procedures >> DTC P1089 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify there are no DTCs set, except DTC P1089, related to the following system/component: Fuel System
    • Go to next step: If a related DTC is not set 
  3. Verify the following aftermarket equipment/accessories are not installed:
    • B75 Mass Air Flow Sensor
    • Calibration/Software
    • Exhaust System
    • Intake Air Duct
    • If aftermarket equipment/accessories are installed 

      Repair or replace as necessary

    • Go to next step: If aftermarket equipment/accessories are not installed 
  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 does not set 
  5. All OK.
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