Thursday, August 8, 2019

2020 Subaru Forester P code Page 39

3. ENABLE CONDITION

Rich -> lean diagnosis response

4. GENERAL DRIVING CYCLE

Perform diagnosis once during deceleration fuel cut from a constant and high speed driving, when rear oxygen sensor is warmed up

sufficiently. (Pay attention to the oxygen sensor voltage for the timing of the deceleration.)

5. DIAGNOSTIC METHOD

- Intermediate

When the oxygen sensor output voltage changes from 0.55 V (rich) to 0.15 V (lean), calculate the minimum response time for output

change between 0.5 V and 0.2 V for the judgment criteria.

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