Rear Oxygen Sensor: Inspection

1. Check that the rear oxygen sensor has no deformation, cracks or other damages.
2. Measure the resistance between rear oxygen sensor terminals.

Fig 1: Measuring Resistance Between Rear Oxygen Sensor Terminals

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Standard
1 and 2	5.6+1.7-0.6 Ω (when 20°C (68°F))