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DTC P0131 O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 1)

DTC P0131 O 2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 1)

DTC DETECTING CONDITION:


• Immediately at fault recognition

• GENERAL DESCRIPTION


Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


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

Turn the ignition switch to OFF.

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

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

Connector & terminal

(B134) No. 33 — Chassis ground:

(B134) No. 26 — Chassis ground:

Is the resistance more than 1 MΩ?

Yes

Replace the front oxygen (A/F) sensor.


No

• Repair ground short circuit in harness between ECM and front oxygen (A/F) sensor connector.