DTC P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

DTC DETECTING CONDITION:

Immediately at fault recognition
GENERAL DESCRIPTION <Ref. to DTC P0134 O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR 1) . >

CAUTION: After repairing or replacing the defective part, carry out the Clear Memory Mode <Ref. to OPERATION CLEAR MEMORY MODE. > and Inspection Mode <Ref. to PROCEDURE INSPECTION MODE. >.

WIRING DIAGRAM:

Fig 1: Identifying O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1) - Wiring Diagram

DIAGNOSTICS PROCEDURE CHART

Step	Check	Yes	No
1 CHECK HARNESS BETWEEN ECM AND FRONT OXYGEN (A/F) SENSOR CONNECTOR. Turn the ignition switch to OFF. Disconnect the connector 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 (B135) No. 8 - (E23) No. 3: (B135) No. 9 - (E23) No. 1:	Is the resistance less than 1 Ω	Go to step 2.	Repair the harness and connector. NOTE: In this case, repair the following item: Open circuit of harness between ECM and front oxygen (A/F) sensor connector Poor contact in front oxygen (A/F) sensor connector Poor contact in ECM connector
2 CHECK POOR CONTACT. Check poor contact of front oxygen (A/F) sensor connector.	Is there poor contact in front oxygen (A/F) sensor connector?	Repair the poor contact in front oxygen (A/F) sensor connector.	Replace the front oxygen (A/F) sensor. <Ref. to FRONT OXYGEN (A/F) SENSOR . >