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Home › Kia › 2019 › Cadenza Technology › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (4 Of 6) › DTC P0420-00: Catalyst System Efficiency Below Threshold (Bank 1) › Component Inspection › Visual Check

Visual Check

  1. Check discoloration by over-heating.
  2. Check deflection or crack (hole)
  3. Check noise.
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