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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 3.0L (Lm2) Diesel - Diagnostic Information And Procedures (4 Of 5)) >> Diagnostic Information and Procedures >> DTC P1428 or P142A >> 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 DTC P0096, P0097, P0098, P0099, P09E, P010B, P0111, P0114, P0116, P0117, P0118, P0119, P0128, P017B, P017C, P017D, P111E, P117B, P117C, P117CD, P117E, P117F, P262B is not set.
    • Go to next step: If a related DTC is not set 
  3. Verify the scan tool parameter: Exhaust Gas Temperature Sensor = -39 to 999°C (-38 to 1, 830°F)
    • If not the specified value 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified value 
  4. Ignition Off TimeGreater than 8 h
  5. Verify the scan tool parameter: Exhaust Gas Temperature Sensor & Intake Air Temperature Sensor 2 = Within 20°C (36°F) of each other
    • If not the specified value 

      Refer to: Circuit/System Testing

    • Go to next step: If the specified value 
  6. 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 
  7. All OK.