Component Inspection

Inspection Condition	(+) Probe		(-) Probe		Specification
Inspection Condition	connector	Terminal	connector	Terminal	Specification
Engine "ON" (warm up condition).	HO2S (Bank 1, Sensor 1) connector	3 (pumping line)	HO2S (Bank 1, Sensor 1) connector	2 (nernst voltage)	Fig.1
Engine "ON" (warm up condition).	HO2S (Bank 1, Sensor 1) connector	6 (trim resistor)	HO2S (Bank 1, Sensor 1) connector	1 (virtual ground)	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 (Bank 1, Sensor 1) and go to "Verification of Repair " procedure.