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Home >> Subaru >> 2016 >> WRX Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls (Diagnostics) (H4DOTC) (WRX-STI)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0125 Insufficient Coolant Temperature For Closed Loop Fuel Control >> Trouble Symptom

DTC P0125 Insufficient Coolant Temperature For Closed Loop Fuel Control: Trouble Symptom

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

Engine does not return to idle.

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. >.
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK TIRE SIZE.  Is the tire size as specified and the same size as three other wheels? Go to step 2.  Replace the tire.
2 CHECK ENGINE COOLANT. 
Check the following items:
  • Amount of engine coolant
  • Engine coolant freeze
  • Contamination of engine coolant
Is the engine coolant normal? Go to step 3.  Fill or replace the engine coolant. < Ref. to ENGINE COOLANT . >
3 CHECK THERMOSTAT.  Does the thermostat remain opened? Replace the thermostat. < Ref. to THERMOSTAT . > Replace the engine coolant temperature sensor. < Ref. to ENGINE COOLANT TEMPERATURE SENSOR . >