Front Oxygen (A/F) Sensor: Inspection

Check that the front oxygen (A/F) sensor has no deformation, cracks or other damages.

Measure the resistance between front oxygen (A/F) sensor terminals.

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Standard
2 and 3	2.5 - 4.0 Ω (when 20°C (68°F))