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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.8L (LWN) Diesel - Diagnostic Information And Procedures (3 Of 3)) >> 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.
    • Restrictions in the exhaust differential pressure sensor ports.
    • Damaged, bent, restricted, or kinked exhaust differential pressure lines.
    • Induction system leaks.
    • Loose or disconnected charge air cooler system components.
    • 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 Diesel Particulate Filter Service Regeneration.
    2. Verify the regeneration completed.
      • If the regeneration did not complete, replace the Diesel Particulate Filter.
      • Go to next step : If the regeneration completed

        Go to next step : All OK.

    • Go to next step : If no DTC is set 
  6. All OK.
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