DTC P0032 - Ho2S Heater Control Circuit High (Bank 1 Sensor 1) -

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

DTC DETECTING CONDITION:
- Two consecutive driving cycles with malfunction
CAUTION: After repair or replacement of malfunctioning parts, conduct Clear Memory Mode < Ref. to OPERATION , CLEAR MEMORY MODE > and INSPECTION MODE < Ref. to OPERATION , INSPECTION MODE. >
WIRING DIAGRAM:

Fig 1: HO2S Heater Control Wiring Diagram
Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK OUTPUT SIGNAL FROM ECM. Turn ignition switch to ON. Measure voltage between ECM connector and chassis ground. Connector & terminal (B136) No. 6 (+) - Chassis ground (-): (B136) No. 17(+) - Chassis ground (-):	Is the measured value more than 8 V?	Go to step 3.	Go to step 2.
2 CHECK FRONT OXYGEN (A/F) SENSOR HEATER CURRENT. Turn ignition switch to OFF. Repair battery short circuit in harness between ECM and front oxygen (A/F) sensor connector. Turn ignition switch to ON. Read data of front oxygen (A/F) sensor heater current using Subaru Select Monitor or the general scan tool. NOTE: Subaru Select Monitor For detailed operation procedure, refer to the "READ CURRENT DATA FOR ENGINE". < Ref. to SUBARU SELECT MONITOR . > General scan tool For detailed operation procedure, refer to the General Scan Tool Instruction Manual.	Is the measured value more than 2.3 A?	Replace ECM. < Ref. to ENGINE CONTROL MODULE . >	END
3 CHECK OUTPUT SIGNAL FROM ECM. Measure voltage between ECM connector and chassis ground. Connector & terminal (B136) No. 6 (+) - Chassis ground (-): (B136) No. 17 (+) - Chassis ground (-):	Is the measured value more than 8 V when shaking harness and connector of ECM?	Repair battery short circuit in harness between ECM and front oxygen (A/F) sensor connector.	END