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Home › Hyundai › 2012 › Tucson GL, Automatic Trans › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (1 Of 3) › DTC P0136: O2 Sensor Circuit (Bank 1/Sensor 2) › Inspection Repair › W/Harness Inspection › Ground Circuit Inspection

Ground Circuit Inspection

  1. Ignition "OFF".
  2. Disconnect HO2S connectors.
  3. Measure resistance between ground terminal of HO2S (B1S2) harness connector and chassis ground.

    Specification:  Approx. 0 Ω

    Fig 1: Measuring Resistance Between Signal Terminal Of HO2S (B1S2) Harness Connector And Chassis Ground
    G06871595Courtesy of HYUNDAI MOTOR CO.
  4. Is resistance within the specification?

    YES 

    NO 

    • Repair or replace as necessary and go to VERIFICATION OF VEHICLE REPAIR .
      NOTE: HO2S must have a clean air reference to function properly. The air is obtained by way of the sensor wire (s). Do not attempt to repair the wire (s), connector, or the terminals.
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