DTC P0112 Intake Air Temperature Sensor 1 Circuit Low

WARNING: This page is about a different car, the 2006 Subaru Outback. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTING CONDITION:

Immediately at fault recognition
GENERAL DESCRIPTION < Ref. to DTC P0112 INTAKE AIR TEMPERATURE SENSOR 1 CIRCUIT LOW , Diagnostic Trouble Code (DTC) Detecting Criteria. >

TROUBLE SYMPTOM:

Erroneous idling
Poor driving performance

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

WIRING DIAGRAM:

Fig 1: Mass Air Flow And Intake Air Temperature Sensor - Wiring Diagram

DTC P0112 INTAKE AIR TEMPERATURE SENSOR 1 CIRCUIT LOW - DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK CURRENT DATA. Start the engine. Read the data of mass air flow and intake air temperature sensor signal using Subaru Select Monitor or general scan tool. NOTE: Subaru Select Monitor For detailed operation procedure, refer to "READ CURRENT DATA FOR ENGINE". < Ref. to SUBARU SELECT MONITOR . > General scan tool For detailed operation procedures, refer to the "General Scan Tool Instruction Manual".	Is the intake air temperature above 120°C (248°F) ?	Go to step 2.	Repair the poor contact. NOTE: In this case, repair the following item: Poor contact in mass air flow and intake air temperature sensor Poor contact in ECM Poor contact in coupling connector Poor contact in joint connector
2 CHECK HARNESS BETWEEN MASS AIR FLOW AND INTAKE AIR TEMPERATURE SENSOR AND ECM CONNECTOR. Turn the ignition switch to OFF. Disconnect the connector from the mass air flow and intake air temperature sensor. Turn the ignition switch to ON. Read the data of mass air flow and intake air temperature sensor signal using Subaru Select Monitor or general scan tool. NOTE: Subaru Select Monitor For detailed operation procedure, refer to "READ CURRENT DATA FOR ENGINE". < Ref. to SUBARU SELECT MONITOR . > General scan tool For detailed operation procedures, refer to the "General Scan Tool Instruction Manual".	Is the intake air temperature less than -40°C (-40°F) ?	Replace the mass air flow and intake air temperature sensor. < Ref. to MASS AIR FLOW AND INTAKE AIR TEMPERATURE SENSOR . >	Repair the ground short circuit in harness between the mass air flow and intake air temperature sensor and ECM connector.