DTC P0125: Insufficient Coolant Temperature for Closed Loop Fuel Control: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine / Trouble Codes.
5. Read the DTCs.

   Result

   Result	Proceed to
   DTC P0125 is output	A
   DTC P0125 and other DTCs are output	B

   HINT: 

   If any DTCs other than P0125 are output, troubleshoot those DTCs first.

B → See step   4 

A: Go to next step 

1. Remove the water inlet with thermostat. Refer to REMOVAL .
2. Check the valve opening temperature of the thermostat.

   Standard

   80 to 84°C (176 to 183°F)

   HINT: 

   In addition to the above check, confirm that the valve is completely closed when the temperature is below the standard.

NG → See step   5 

OK: Go to next step 

1. Check for defects in the cooling system that might cause the system to be too cold, such as abnormal radiator fan operation or any modifications.

NG → REPAIR OR REPLACE COOLING SYSTEM 

OK → See step   6