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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 P2459 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON.
  2. Verify that no other DTCs are set.
    • Go to next step: If no other DTCs are set 
  3. Verify the conditions listed below do not exist:
    • Any damaged exhaust system components
    • Loose or improperly installed exhaust system components.
    • Leaking exhaust system/turbo charger. Refer to Exhaust Leakage
    • Restrictions in the exhaust differential pressure sensor ports.
    • Damaged, bent, restricted, or kinked exhaust differential pressure lines.
    • Leaking or restricted intake system/charge air hoses. Refer to Component/System Leak Test 
    • If a condition is found 

      Repair as necessary

    • Go to next step: If no condition is found 
  4. Ignition ON.
  5. Verify DTC P2459 is not set.
    • If the DTC is set 
    1. Perform the Particulate Filter Service Regeneration. Particulate Filter Service Regeneration
    2. Verify the regeneration completed.
      • If the regeneration did not complete, replace the Particulate Filter.
    • Go to next step: If no DTC is set 
  6. All OK.
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