CHECK REAR OXYGEN SENSOR DATA.

1) Warm-up the engine until engine coolant temperature is above 70°C (158°F), and rapidly reduce the engine speed from 3,000 rpm.

2) Read the data of rear oxygen sensor signal using Subaru Select Monitor or general scan tool.

NOTE:

For MT model, depress the clutch pedal.

Subaru Select Monitor

For detailed operation procedure, refer to “READ CURRENT DATA FOR ENGINE”.

General scan tool

For detailed operation procedure, refer to the general scan tool operation manual.

QUESTION

Is the voltage 250 mV or less?

Yes No