Component Inspection

Inspection Condition	(+) Probe		(-) Probe		Reference
Inspection Condition	Connector	Terminal	Connector	Terminal	Reference
Engine "ON". (warm up condition)	HO2S (Bank 1, Sensor 1) connector	3 (pumping current)	HO2S (Bank1, Sensor1) connector	2 (nernst voltage)	Fig.1
Engine "ON". (warm up condition)	HO2S (Bank 1, Sensor 1) connector	1 (virtual ground)	HO2S (Bank1, Sensor1) connector	6 (trim resistor)	Fig.1

Courtesy of KIA MOTORS AMERICA, INC.

Good

No Good

Carefully re-do this troubleshooting guide steps.
If no problems were found with the circuits or connectors, replace the HO2S (Bank1 Sensor1) and go to "VERIFICATION OF REPAIR " procedure.