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HOMESERVICE MANUALSSUBARU2014FORESTER 2.5I, ENG CD FB25BA, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 9 (ENGINE CONTROL SYSTEM (DIAGNOSTICS) (H4DOTC))DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)DTC P0116: ENGINE COOLANT TEMPERATURE SENSOR 1 CIRCUIT RANGE/PERFORMANCETROUBLE SYMPTOM
2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard Trans

DTC P0116: Engine Coolant Temperature Sensor 1 Circuit Range/Performance: Trouble Symptom

2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard TransSECTION Trouble Symptom
WARNING: This page is about a different variant/trim than selected.
  • Hard to start
  • Improper idling
  • Poor driving performance
CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode < Ref. to OPERATION , Clear Memory Mode. >, and Inspection Mode < Ref. to PROCEDURE , Inspection Mode. >.
DTC PROCEDURE

Step Check Yes No
1 CHECK FOR ANY OTHER DTC ON DISPLAY.  Is any other DTC displayed? Check the appropriate DTC using the "List of Diagnostic Trouble Code (DTC)". < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Go to step 2  .
2 CHECK ENGINE COOLANT TEMPERATURE SENSOR. 
  1. Disconnect the connectors from the engine coolant temperature sensor.
  2. Measure the resistance between engine coolant temperature sensor terminals when the engine coolant is cold and after warmed up.

    Terminals 

    No. 1 - No. 2: 

 Is the resistance of engine coolant temperature sensor different between when engine coolant is cold and after warmed up? Repair the poor contact of ECM connector. Replace the engine coolant temperature sensor. < Ref. to ENGINE COOLANT TEMPERATURE SENSOR . >
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.