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Home >> Kia >> 2021 >> Rio S, 4D Sedan >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (4 Of 6) >> DTC P0420-00: Catalyst System Efficiency Below Threshold (Bank 1) >> System Inspection >> O2 Sensor Inspection

O2 Sensor Inspection

Inspection Condition (+) Probe (-) Probe Reference
Connector Terminal Connector Terminal
  1. Engine "ON" (warm up condition).
HO2S (B1/S2) connector 1 (signal) Chassis ground - Fig.1
G13708725Courtesy of KIA MOTORS AMERICA, INC.

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