O2 Sensor Inspection

■ Check HO2S 

1. Visually/physically inspect the following conditions:
   • 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. Ignition "OFF"
3. Connect KDS/GDS to Data Link Connector (DLC).
4. Warm up the engine to normal operating temperature and let it idle.
5. Monitor following parameters in "Current Data  " with KDS/GDS.

   Specification:  Above 0.6V at idle

   Fig 1: Scantool Display - Up/Downstream O2 Sensor Voltage Current Data When O2 Sensor Ready For Operation At Idle

   Courtesy of KIA MOTORS AMERICA, INC.
6. Is measured value within specification?

   YES 

   • Go to "Fuel System Inspection " procedure.

   NO 

   • Carefully re-do this troubleshooting guide steps.
   • If no problems were found with the circuits or connectors, Replace the O2 Sensor and then go to "Verification of Vehicle Repair " procedure.
   CAUTION:

   • Install the component with the specified torques.
   • Note that internal damage may occur when the component is dropped or mistreated.
   CAUTION:

   • DO NOT use a cleaner, spray, or grease to sensing element and connector of the sensor because oil component in them may cause malfunction or affects on sensor performance.
   • Sensor and its wiring may be damaged in case of contacting with the exhaust system (Exhaust Manifold, Catalytic Converter, and others).