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Subaru Legacy Service Manual: Dtc p0152 a/f / o2 sensor circuit high voltage bank 2 sensor 1

DTC DETECTING CONDITION:

Immediately at fault recognition

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

STEPCHECKYESNO

1.CHECK FRONT OXYGEN (A/F) SENSOR CONNECTOR AND COUPLING CONNECTOR.

Has water entered the connector-

Completely remove any water inside.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0152 A/F / O2 SENSOR CIRCUIT HIGH VOLTAGE BANK 2 SENSOR 1

2.CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from front oxygen (A/F) sensor.

3) Turn the ignition switch to ON.

4) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(E158) No. 45 (+) — Chassis ground (−):

(E158) No. 44 (+) — Chassis ground (−):

Is the voltage 8 V or more-

Repair the short circuit to power in the harness between ECM connector and front oxygen (A/F) sensor connector.

Replace the front oxygen (A/F) sensor. Front Oxygen (A/F) Sensor

1. OUTLINE OF DIAGNOSIS

NOTE:

For the detection standard, refer to DTC P0132. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0132 A/F / O2 SENSOR CIRCUIT HIGH VOLTAGE BANK 1 SENSOR 1

Dtc p0154 a/f / o2 sensor circuit no activity detected bank 2 sensor 1
DTC DETECTING CONDITION:Immediately at fault recognitionCAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mod ...

Dtc p0151 a/f / o2 sensor circuit low voltage bank 2 sensor 1
DTC DETECTING CONDITION:Immediately at fault recognitionCAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mod ...

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DIAGNOSIS:Subaru Select Monitor communication line is open or shorted.TROUBLE SYMPTOM:Not communicable with Subaru Select Monitor.WIRING DIAGRAM:CAN communication system CAN Communication System > WIRING DIAGRAMSTEPCHECKYESNO1.CHECK SUBARU SELECT MONITOR.1) Connect the Subaru Select Monitor to anot ...

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