DTC P0134: A/F/O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1: Notes
1. -
DTC detecting condition:
Immediately at fault recognition
Wiring diagram:
Engine Electrical System Ref. to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM .
CAUTION:
Use the check board when measuring the ECM terminal voltage and resistance.
Ref. to ENGINE (DIAGNOSTICS) (H4DO)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD
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NOTE:
After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure.
Ref. to ENGINE (DIAGNOSTICS) (H4DO)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE
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- CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR CONNECTOR (OPEN)
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- Turn the ignition switch to OFF.
- Disconnect the connector from ECM.
- Disconnect the connectors from front oxygen (A/F) sensor.
- Measure the resistance of harness between ECM connector and front oxygen (A/F) sensor connector.
Connector & terminal
(E158) No. 3 - (B379) No. 3:
(E158) No. 4 - (B379) No. 4:
Is the resistance less than 1 Ω?
Yes: Go to 2 .
No: In this case, repair the following item:
- Open circuit in harness between ECM connector and front oxygen (A/F) sensor connector
- Poor contact of coupling connector
- CHECK FOR POOR CONTACT
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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?
Yes: Repair the poor contact of ECM or front oxygen (A/F) sensor connector.
No: Replace the front oxygen (A/F) sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>FRONT OXYGEN (A/F) SENSOR .