Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc p0058 a/f / o2 heater control circuit low bank 2 sensor 2

Subaru Legacy BN/BS (2015-2019) Service Manual / Engine (diagnostics)(h6do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p0058 a/f / o2 heater control circuit low bank 2 sensor 2

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mode > PROCEDURE.

WIRING DIAGRAM:

• Engine Electrical System ENGINE TYPE EZ (WITHOUT PUSH BUTTON START) Engine Electrical System > WIRING DIAGRAM

• Engine Electrical System ENGINE TYPE EZ (WITH PUSH BUTTON START) Engine Electrical System > WIRING DIAGRAM

STEP	CHECK	YES	NO
1.CHECK HARNESS BETWEEN ECM AND REAR OXYGEN SENSOR CONNECTOR. 1) Turn the ignition switch to OFF. 2) Measure the voltage between ECM connector and chassis ground. Connector & terminal (E158) No. 11 (+) — Chassis ground (−):	Is the voltage 10 V or more-	Repair the short circuit to power in the harness between ECM connector and rear oxygen sensor connector.	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0058 A/F / O2 HEATER CONTROL CIRCUIT LOW BANK 2 SENSOR 2
2.CHECK GROUND CIRCUIT FOR ECM. 1) Disconnect the connector from ECM. 2) Measure the resistance between ECM connector and chassis ground. Connector & terminal (E158) No. 60 — Chassis ground: (E158) No. 61 — Chassis ground: (E158) No. 62 — Chassis ground: (E158) No. 63 — Chassis ground: (E158) No. 64 — Chassis ground: (E158) No. 65 — Chassis ground:	Is the resistance less than 5 --	Repair the poor contact of ECM connector.	Repair the open circuit in harness between ECM connector and engine ground.

1. OUTLINE OF DIAGNOSIS

NOTE:

For the detection standard, refer to DTC P0038. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0038 A/F / O2 HEATER CONTROL CIRCUIT HIGH BANK 1 SENSOR 2

Dtc p013c o2 sensor slow response - rich to lean bank 2 sensor 2

DTC DETECTING CONDITION:Detected when two consecutive driving cycles with fault occur.CAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and I ...

Dtc p0057 a/f / o2 heater control circuit low bank 2 sensor 2

Other materials:

Basic inspection
1. VOLTAGE MEASUREMENT1. Using a voltmeter, connect the negative lead to a good ground point or negative battery terminal. Connect the positive lead to the connector or component terminal.2. Contact the positive lead of the voltmeter on connector (A). The voltmeter will indicate a voltage.3. Shift t ...