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Home >> Kia >> 2018 >> Rio LX, 4D Hatchback, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) >> DTC P0139-00: O2 Sensor Circuit Slow Response >> Component Inspection
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Component Inspection

Inspection Condition (+) Probe (-) Probe Reference
Connector Terminal Connector Terminal
  1. Ignition "ON", Engine "ON"
HO2S (B1/S2) harness connector 1 (Signal_ Chassis ground 2 (Ground) Figure below
HO2S (B1/S2) harness connector 4 (Control) Chassis ground -
G12584987Courtesy of KIA MOTORS AMERICA, INC.

Good 

No Good