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Home › Kia › 2015 › Forte LX, Automatic Trans › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (1 Of 2) - 1.8L › DTC P0136: O2 Sensor Circuit (Bank 1/Sensor 2) › Wiring Inspection › Signal Circuit Inspection

Signal Circuit Inspection

  1. Ignition "ON" & Engine "OFF"
  2. Measure voltage between signal terminal of HO2S (B1S2) harness connector and chassis ground

    Specification:  Approx. 0.3V

  3. Is voltage within the specification?

    YES 

    • Go to next step as below.

    NO 

    • Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
      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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