| CHECK FRONT OXYGEN (A/F) SENSOR DATA. |
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1) Start the engine. 2) While observing the Subaru Select Monitor or general scan tool screen, warm up the engine until engine coolant temperature is above 75°C (167°F). When the engine is already warmed up, keep the engine idling for more than one minute. 3) Read the data of front oxygen (A/F) sensor signal using Subaru Select Monitor or general scan tool. NOTE: |