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Home › Chevrolet › 2017 › City Express LS › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 2.0L › Diagnostic Information And Procedures › DTC P0420 › Repair Verification

Repair Verification

  1. Clear the DTCs.
  2. Operate the vehicle within the Conditions for Running and Setting for at least 10 min.
  3. Stop the vehicle.
  4. Engine OFF, allow the K 20 Engine Control Module to power down.
  5. Operate the vehicle within the Conditions for Running and Setting for at least 10 min. DTC P0420 should run and pass.
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