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

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

Trouble symptom:

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.

Step	Check	Yes	No
1 CHECK ENGINE COOLANT. Check the following items: Amount of engine coolant Engine coolant freeze Contamination of engine coolant	Is the check result OK?	Go to step 2	Fill or replace the engine coolant. Ref. to REPLACEMENT , Engine Coolant.
2 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