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Home >> Subaru >> 2013 >> Outback R >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H6DO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P014C O2 Sensor Slow Response - Rich To Lean (Bank 1 Sensor 1) >> Diagnostic Method 1

Diagnostic Method 1

Detect the malfunction by checking "Cumulative value of time when λ changes from lean → rich" in comparison to "Time during which diagnosis is in progress".

Fig 1: Sensor Output And Accumulated Time Graph
G08581764Courtesy of SUBARU OF AMERICA, INC.

Judge as NG when the following conditions are established.

JUDGMENT VALUE

Malfunction Criteria Threshold Value DTC
(Cumulative value of time when λ changes from lean → rich)/(Time during which diagnosis is in progress) < 0.4 (Bin5 model) P014C
< 0.38 (ULEV model) P014E
> 0.68 (Bin5 model) P014D
> 0.7 (ULEV model) P014F

Time Needed for Diagnosis:  90 seconds

Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.

Judge as OK and clear the NG if the following conditions are established.

JUDGMENT VALUE

Malfunction Criteria Threshold Value DTC
(Cumulative value of time when λ changes from lean → rich)/(Time during which diagnosis is in progress) ≥ 0.4 (Bin5 model) P014C
≥ 0.38 (ULEV model) P014E
≤ 0.68 (Bin5 model) P014D
≤ 0.7 (ULEV model) P014F

Time Needed for Diagnosis:  90 seconds