DTC P0032 H02S Heater Control Circuit High (Bank 1 Sensor 1)

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

DTC DETECTING CONDITION:

Detect as soon as malfunction occurs.
GENERAL DESCRIPTION < Ref. to DTC P0032 H02S HEATER CONTROL CIRCUIT HIGH (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 P0032 H02S Heater Control Circuit High (Bank 1 Sensor 1)

Courtesy of SUBARU OF AMERICA, INC.

DTC P0032 H02S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1) DIAGNOSIS

Step	Check	Yes	No
1. CHECK OUTPUT SIGNAL FROM ECM. Turn the ignition switch to ON. Measure the voltage between ECM connector and chassis ground. Connector & terminal (B134) No. 2 (+) - Chassis ground (-): (B134) No. 3 (+) - Chassis ground (-):	Is the voltage more than 8 V?	Go to step 2.	Go to step 3.
2. CHECK FRONT OXYGEN (A/F) SENSOR HEATER CURRENT. Turn the ignition switch to OFF. Repair the battery short circuit in harness between ECM and front oxygen (A/F) sensor connector. Turn the ignition switch to ON. Read the data of front oxygen (A/F) sensor heater current using Subaru Select Monitor or OBD-II general scan tool. NOTE: Subaru Select Monitor For detailed operation procedure, refer to the "READ CURRENT DATA FOR ENGINE". < Ref. to , SUBARU SELECT MONITOR . > OBD-II general scan tool For detailed operation procedure, refer to the OBD-II general scan tool instruction manual .	Is the current more than 2.3 A?	Replace the ECM. < Ref. to ENGINE CONTROL MODULE (ECM) . >	END
3. CHECK OUTPUT SIGNAL FROM ECM. Measure the voltage between ECM connector and chassis ground. Connector & terminal (B134) No. 2 (+) - Chassis ground (-): (B134) No. 3 (+) - Chassis ground (-):	Does the voltage change by shaking the ECM harness and connector?	Repair battery short circuit in harness between ECM and front oxygen (A/F) sensor connector.	END