DTC P0125: Insufficient Coolant Temperature for Closed Loop Fuel Control [08/2016 - 08/2017]: 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 and ECT / Trouble Codes.
5. Read the DTCs.
   RESULT
   
   

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

   HINT: 

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

Result: 

B 

GO TO DTC CHART 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2016 - 08/2017] )

Result: 

A 

See step  2

1. Remove the water inlet with thermostat sub-assembly (Refer to REMOVAL [08/2015 - ] ).
2. Check the valve opening temperature of the water inlet with thermostat sub-assembly.

   Standard opening temperature

   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.

Result: 

NG 

REPLACE WATER INLET WITH THERMOSTAT SUB-ASSEMBLY 

(Refer to REMOVAL [08/2015 - ] )

Result: 

OK 

See step  3

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.

   HINT: 

   Perform "Inspection After Repairs" after replacing the engine coolant temperature sensor (Refer to INITIALIZATION [08/2015 - ] ).

Result: 

OK 

REPLACE ENGINE COOLANT TEMPERATURE SENSOR 

(Refer to REMOVAL [08/2015 - ] )

Result: 

NG 

REPAIR OR REPLACE COOLING SYSTEM