DTC P013A O2 Sensor Slow Response - Rich To Lean Bank 1 Sensor 2: Wiring Diagram

Engine Electrical System ENGINE TYPE FA (WITHOUT PUSH BUTTON START) Ref. to the appropriate SYSTEM WIRING diagram article. ENGINE TYPE FA (WITHOUT PUSH BUTTON START).
Engine Electrical System ENGINE TYPE FA (WITH PUSH BUTTON START) Ref. to the appropriate SYSTEM WIRING diagram article. ENGINE TYPE FA (WITH PUSH BUTTON START).

Fig 1: O2 Sensor Slow Response - Wiring Diagram (Rich To Lean Bank 1 Sensor 2)
Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK HARNESS BETWEEN ECM AND REAR OXYGEN SENSOR CONNECTOR. Turn the ignition switch to OFF. Disconnect the connector from ECM and rear oxygen sensor. Measure the resistance of harness between ECM connector and rear oxygen sensor connector. Connector & terminal (E158) No. 16 - (E25) No. 4:	Is the resistance less than 1 Ω?	Go to step 2.	Repair the open circuit of harness between ECM connector and rear oxygen sensor connector.
2 CHECK HARNESS BETWEEN ECM AND REAR OXYGEN SENSOR CONNECTOR. Measure the resistance between rear oxygen sensor connector and engine ground. Connector & terminal (E25) No. 4 - Engine ground:	Is the resistance 1 MΩ or more?	Go to step 3.	Repair the short circuit to ground in harness between ECM connector and rear oxygen sensor connector.
3 CHECK REAR OXYGEN SENSOR. Measure the resistance between rear oxygen sensor terminals. Terminals No. 3 - No. 4	Is the resistance less than 1 Ω?	Replace the rear oxygen sensor. < Ref. to REAR OXYGEN SENSOR . >	Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.