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Subaru Legacy Service Manual: Dtc p0134 a/f / o2 sensor circuit no activity detected bank 1 sensor 1

Subaru Legacy Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p0134 a/f / o2 sensor circuit no activity detected bank 1 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 FB (WITHOUT PUSH BUTTON START) Engine Electrical System > WIRING DIAGRAM

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

STEPCHECKYESNO

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

1) Turn the ignition switch to OFF.

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

3) Measure the resistance of harness between ECM connector and front oxygen (A/F) sensor connector.

Connector & terminal

(E158) No. 46 — (E24) No. 3:

(E158) No. 33 — (E24) No. 4:

Is the resistance less than 1 --

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0134 A/F / O2 SENSOR CIRCUIT NO ACTIVITY DETECTED BANK 1 SENSOR 1

Repair the open circuit of harness between ECM connector and front oxygen (A/F) sensor connector.

2.CHECK FOR POOR CONTACT.

Check for poor contact of ECM and front oxygen (A/F) sensor connector.

Is there poor contact of ECM or front oxygen (A/F) sensor connector-

Repair the poor contact of ECM or front oxygen (A/F) sensor connector.

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

1. OUTLINE OF DIAGNOSIS

Detect open circuits of the sensor.

Judge as NG when the impedance of the element is large.

2. COMPONENT DESCRIPTION

(A)

Electromotive force

(B)

Air fuel ratio

(C)

Rich

(D)

Lean

(1)

Exhaust gas

(2)

ZrO2

3. EXECUTION CONDITION

Secondary Parameters

Execution condition

Battery voltage

≥ 10.9 V

Time of heater control duty at 70 % or more

≥ 36000 ms

4. GENERAL DRIVING CYCLE

Perform the diagnosis continuously after the enable conditions have been established.

5. DIAGNOSTIC METHOD

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Judgment Value

Malfunction Criteria

Threshold Value

Front oxygen (A/F) sensor impedance

> 450 -

Time Needed for Diagnosis: 5000 ms

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

Dtc p0137 o2 sensor circuit low voltage bank 1 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 p0132 a/f / o2 sensor circuit high voltage bank 1 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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DETECTING CONDITION:Defective combination meterTROUBLE SYMPTOM:When the ignition switch is turned to ON (engine OFF), brake warning light (EBD warning light), ABS warning light, VDC OFF indicator light, and VDC warning light & VDC indicator light do not illuminate.NOTE:When pressing the VDC OFF swit ...

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