Diagnostic Method: Notes

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Detect the trouble by calculating the time from the beginning of the fuel cut to the beginning of the rear oxygen sensor voltage starting to drop.

Fig 1: Time From The Beginning Of The Fuel Cut To The Beginning Of The Rear Oxygen Sensor Voltage Starting To Drop Graph

Courtesy of SUBARU OF AMERICA, INC.