Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc p013f o2 sensor delayed response - lean to rich bank 1 sensor 2

Subaru Legacy BN/BS (2015-2019) Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p013f o2 sensor delayed response - lean to rich bank 1 sensor 2

NOTE:

For the diagnostic procedure, refer to DTC P013A. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P013A O2 SENSOR SLOW RESPONSE - RICH TO LEAN BANK 1 SENSOR 2

1. OUTLINE OF DIAGNOSIS

Detect the delayed response of rear oxygen sensor output for lean > rich.

After the deceleration fuel cut has completed, detect the trouble by calculating the time when the rear oxygen sensor output increases to the predetermined voltages.

Judge as NG when the response time is larger than the threshold value.

2. COMPONENT DESCRIPTION

(A)	Electromotive force	(B)	Air fuel ratio	(C)	Rich
(D)	Lean	(E)	Theoretical air fuel ratio	(F)	Comparative voltage

(1)	Atmosphere	(2)	Exhaust gas	(3)	Electromotive force

3. EXECUTION CONDITION

Secondary Parameters	Execution condition
Battery voltage	> 10.9 V
Front oxygen (A/F) sensor closed loop control	Operation
Rear oxygen sensor voltage when fuel cut has completed	< 0.15 V
Estimated element temperature of rear oxygen sensor when fuel cut has completed	≥ 500 °C (932 °F)
Fuel cut time	≥ 5000 ms

4. GENERAL DRIVING CYCLE

Perform diagnosis only once when recovering from the deceleration fuel cut continued for more than predetermined time with the rear oxygen sensor warmed up sufficiently.

5. DIAGNOSTIC METHOD

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

(A)	0.3 V	(B)	0 V	(C)	Diagnostic parameter
(D)	Normal	(E)	Malfunction

Judge as NG when the following conditions are established.

Judgment Value

Malfunction Criteria	Threshold Value
Time needed for the rear oxygen sensor voltage to change up to 0.3 V after the fuel cut was deactivated	> 3750 time(s) - 32 ms

Time Needed for Diagnosis: 3750 time(s) - 32 ms

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

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Other materials:

Inspection
Before performing diagnosis, check the following items which might affect VDC problems.1. BATTERYCheck the battery. Battery > INSPECTION Battery > INSPECTION2. GROUNDCheck the installation of the ground bolt for VDC.3. BRAKE FLUID1. Check the brake fluid level.2. Check the brake fluid for leaks.4. ...