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Home >> Subaru >> 2023 >> Ascent Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostics) (1 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P013B: O2 Sensor Slow Response - Lean To Rich Bank 1 Sensor 2 >> Component Description >> Diagnostic Method
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Diagnostic Method

Detect a malfunction by measuring the rear oxygen sensor response time after fuel cut.

G16350332Courtesy of SUBARU OF AMERICA, INC.
(A) 0.5 V
(B) 0.2 V
(C) 0 V
(D) Diagnostic parameter
(E) Voltage at normal condition
(F) Response time at normal condition
(G) Voltage at abnormal condition
(H) Response time at abnormal condition

Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Rear oxygen sensor voltage value Less than 0.5 V
Elapsed time More than 2500 ms

Time needed for diagnosis:  Less than 1 s

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.