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Home › Kia › 2016 › Optima Hybrid › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (3 Of 3) (HEV) › DTC P2096: Post Catalyst Fuel Trim System Too Lean (Bank 1) › System Inspection › O2 Sensor Inspection › O2 Sensor Signal Inspection

O2 Sensor Signal Inspection

  1. Ignition "OFF".
  2. Connect VMI to GDS and set up an oscilloscope as follow (4-channel);

    Channel A (+): Pin No. 3 (V_IP) terminal of Upstream O2 Sensor.

    Channel A (-): Ground

    Channel B (+): Pin No. 1 (Signal) terminal of Downstream O2 Sensor.

    Channel B(-): Ground

  3. Ignition "ON" & Engine "ON".
    Fig 1: Display - Upstream/Downstream O2 Sensor Signal Waveform (Warm-Up Condition)
    G11828469Courtesy of KIA MOTORS AMERICA, INC.
    1. Approx. 2500 RPM.
    2. Fuel Cut after acceleration.
  4. Is measured value within speechification?

    YES 

    • Go to next 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 mis-treated.
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).
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