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Home >> Kia >> 2004 >> Rio Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel System & Fault Isolation >> DTC Troubleshooting >> DTC P0140: Ho2S Circuit No Activity Detected (Bank 1, Sensor 2) >> Inspection/Repair >> Component Inspection

Component Inspection

  1. Visually/physically inspect following items:
    • Ensure that the sensor is securely installed
    • Check for corrosion on terminals
    • Check for damaged wiring

    Repair as necessary and go to next step

  2. Warm up the engine to normal operating temperature and check that HO2S signal is active.
  3. Connect Scantool and monitor the "O2 SNSR VOLT. (B1/S2)" parameter on the Scantool data list.
    1. Test Condition: Ignition "ON" & Engine "ON" & In Idle ("Closed Loop") condition
    2. Specification: Above 0.6V
  4. Is sensor data near the specified value?

    YES

    1. Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure

    NO

    1. Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace HO2S and then go to "VERIFICATION OF VEHICLE REPAIR " procedure
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