Component Inspection

WARNING: This page is about a different car, the 2017 Kia Niro. However, it is still accessible from the selected car via links, so may be relevant.

INSPECTION PART - O2 SENSOR (UP) (COMPONENT & CONNECTOR) INSPECTION

Inspection Condition	(+) Probe		(-) Probe		Specification
Inspection Condition	Connector	Terminal	Connector	Terminal	Specification
Engine "ON" and Engine Idle.	O2 Sensor (UP) component side	1 (Virtual Ground)	O2 Sensor (UP) connector	2 (Nernst Voltage)	Fig 1
Engine "ON" and Engine Idle.	O2 Sensor (UP) connector	3 (Current Pump)	O2 Sensor (UP) connector	4 (Current Adjust)	Fig 1

Fig 1: Screen Display - Normal Signal Waveform Of O2 Sensor (UP) At Engine WOT

Courtesy of KIA MOTORS AMERICA, INC.

Good	Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage. Repair or replace as necessary and then go to "Verification Of Repair " procedure.
No Good	If no problems were found with the circuits or connectors, replace the O2 Sensor (UP)-HEATED OXYGEN SENSOR (HO2S) and go to "Verification Of Repair " procedure.