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Home >> Kia >> 2025 >> Soul EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 6) >> DTC P0139-00: O2 Sensor Circuit Slow Response (Bank 1/Sensor 2) >> Component Inspection
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Component Inspection

Inspection Condition (+) Probe (-) Probe Reference
Connector Terminal Connector Terminal
  1. Engine "ON" (Warm up condition).
HO2S (Bank1, Sensor 2 connector 2 (ground) HO2S (Bank1, Sensor 2 connector 1 (signal) Fig. 1
HO2S (Bank1, Sensor 2 connector 3 (power) HO2S (Bank1, Sensor 2 connector 4 (heater)
G15728867Courtesy of KIA MOTORS AMERICA, INC.

Good 

No Good