CHECK REAR OXYGEN SENSOR VOLTAGE.

1) Warm-up the engine until engine coolant temperature is above 70°C (158°F), and keep the engine speed at 3,000 rpm. (Max. 2 min.)

2) Read the voltage of rear oxygen (A/F) sensor signal using Subaru Select Monitor.

NOTE:

For MT model, depress the clutch pedal.

Subaru Select Monitor

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

QUESTION

Is the voltage 490 mV or more?

Yes No