DTC P0197 Engine Oil Temperature Sensor 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 P0197 ENGINE OIL TEMPERATURE SENSOR LOW , Diagnostic Trouble Code (DTC) Detecting Criteria. >

TROUBLE SYMPTOM:

Hard to start
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: Engine Oil Temperature Sensor - Wiring Diagram

DTC P0197 ENGINE OIL TEMPERATURE SENSOR LOW - DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK HARNESS BETWEEN OIL TEMPERATURE SENSOR AND ECM CONNECTOR. Disconnect the connector from ECM and engine oil temperature sensor. Measure the resistance of harness between engine oil temperature sensor connector and engine ground. Connector & terminal (B134) No. 23 - Engine ground: (B134) No. 29 - Engine ground:	Is the resistance more than 1 MΩ?	Go to step 2.	Repair the ground short circuit between ECM and oil temperature sensor connector.
2 CHECK POOR CONTACT. Check poor contact of oil temperature sensor connector.	Is there poor contact in oil temperature sensor connector?	Repair the poor contact.	Replace the engine oil temperature sensor. < Ref. to OIL TEMPERATURE SENSOR . >