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Home >> Kia >> 2015 >> Rio LX, 4D Hatchback, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 2) >> DTC P0420: Catalyst System Efficiency below Threshold (Bank 1) >> Scantool Diagnostics >> Monitor GDS Data
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Monitor GDS Data

  1. Connect GDS to DLC (Data Link Cable).
  2. Warm up the engine to normal operating temperature.
  3. Monitor "HO2S (S1), HO2S (S2)" parameter on GDS.
    Fig 1: Display - HO2S (S1), HO2S (S2) Parameter Current Data Screen
    G08324909Courtesy of KIA MOTORS AMERICA, INC.
  4. Are the parameters displayed correctly?

    YES 

    Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    Go to "SYSTEM INSPECTION " procedure.

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