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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Engine Control System (Diagnostics) (P000A To P015B) (H4DO)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P013E O2 Sensor Delayed Response - Rich To Lean Bank 1 Sensor 2 >> Diagnostic Method

Diagnostic Method

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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: Rear Oxygen Sensor Diagnostic Parameter Graph
G11272733Courtesy of SUBARU OF AMERICA, INC.

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Time needed for the rear oxygen sensor voltage to change up to 0.5 V after the fuel cut started > 4000ms

Time needed for diagnosis:  5000ms

Malfunction indicator light illumination:  Illuminates as soon as a malfunction occurs.