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

A thermistor is built into the Engine Coolant Temperature (ECT) sensor, of which the resistance value varies according to the ECT.

The structure of the sensor and its connection to the ECM are the same as those of the Intake Air Temperature (IAT) sensor.

DTC REFERENCE

DTC No.	DTC Detection Condition	Trouble Area
P0125	Case 1: Engine coolant temperature (ECT) is less than - 19.45°C (-3°F) at engine and following conditions are met (2 trip detection logic): 20 minutes elapsed since engine starts ECT sensor value remains below closed-loop fuel control enabling temperature Case 2: ECT is between -19.45°C and -8.34°C (-3°F and 17°F) at engine start and following conditions are met (2 trip detection logic): 109 seconds elapsed since engine starts ECT sensor value remains below closed-loop fuel control enabling temperature Case 3: ECT is between -8.34°C ( 17°F) at engine start and following conditions are met (2 trip detection logic): 74 seconds elapsed since engine starts ECT sensor value remains below closed-loop fuel control enabling temperature	Engine coolant temperature sensor Cooling system Thermostat

DTC No.

DTC Detection Condition

Trouble Area

P0125

Case 1:
Engine coolant temperature (ECT) is less than - 19.45°C (-3°F) at engine and following conditions are met (2 trip detection logic):

Case 2:
ECT is between -19.45°C and -8.34°C (-3°F and 17°F) at engine start and following conditions are met (2 trip detection logic):

Case 3:
ECT is between -8.34°C ( 17°F) at engine start and following conditions are met (2 trip detection logic):