Component Inspection

Disconnect the battery negative (-) terminal.
Disconnect the HO2S connector.
Measure resistance between the HO2S terminals.
Front: Pin 4 to Pin 5

Rear: Pin 3 to Pin 4

[Front]

Courtesy of KIA MOTORS AMERICA, INC.

[Rear]

Courtesy of KIA MOTORS AMERICA, INC.
Compare the measured resistance with the specification below.
Specification:

Front: 2.8 - 4.5 Ω

Rear: 5.4 - 6.6 Ω