DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control: Notes

1. - 

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

Trouble symptom: 

Engine does not return to idle.

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

   Is DTC other than P0125 displayed? (Current code)

   Yes  : Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST

   No  : Go to  2.

2. CHECK ENGINE COOLANT  .

   Check the following items:

   • Amount of engine coolant
   • Engine coolant freeze
   • Contamination of engine coolant

   Is the check result OK?

   Yes  : Go to  3.

   No  : Fill or replace the engine coolant. Ref. to COOLING (H4DOTC)>ENGINE COOLANT

3. CHECK THERMOSTAT  .

   Check the thermostat. Ref. to COOLING (H4DOTC)>THERMOSTAT>INSPECTION

   Does the thermostat remain opened?

   Yes  : Replace the thermostat. Ref. to COOLING (H4DOTC)>THERMOSTAT

   No  : Go to  4.

4. CHECK ENGINE COOLANT TEMPERATURE SENSOR  .

   Check the engine coolant temperature sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE COOLANT TEMPERATURE SENSOR>INSPECTION

   Is the check result OK?

   Yes  : Go to  5.

   No  : Replace the engine coolant temperature sensor. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE COOLANT TEMPERATURE SENSOR

5. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY
   3. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)

   Is DTC for [Engine] displayed? (Current code)

   Yes  : Check the connection of connector. If there is no faulty connector, perform the diagnosis for the displayed DTCs. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST

   NOTE:

   After the concerned inspection step is performed, the final check in Basic Diagnostic Procedure is not necessary. 

   No  : Finish the diagnosis.

   NOTE:

   After the concerned inspection step is performed, the final check in Basic Diagnostic Procedure is not necessary.