DTC P1152: O2 Sensor Circuit Range/Performance (Low) (Bank 1 Sensor 1)

WARNING: This page is about a different variant/trim than selected.

DTC DETECTING CONDITION:
Two consecutive driving cycles with fault
GENERAL DESCRIPTION < Ref. to DTC P1152 O 2 SENSOR CIRCUIT RANGE/PERFORMANCE (LOW) (BANK 1 SENSOR 1) , Diagnostic Trouble Code (DTC) Detecting Criteria. >

CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode < Ref. to , OPERATION , Clear Memory Mode. > and Inspection Mode < Ref. to , PROCEDURE , Inspection Mode. >.

WIRING DIAGRAM:

Fig 1: DTC P1152 - Wiring Diagram And Connector Terminal

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE DTC P1152

Step	Check	Yes	No
1 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. 26 - (E262) No. 1: (B134) No. 33 - (E262) No. 3:	Is the measured value less than 1 Ω?	Go to step 2 .	Repair the harness and connector. NOTE: In this case, repair the following: Open circuit in 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 in 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 . >