On Board Diagnosis Logic

NOTE: If DTC P0125 is displayed with P0116, first perform the trouble diagnosis for DTC P0116. Refer to [P0116 ECT SENSOR ].

NOTE: If DTC P0125 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117 or P0118. Refer to [P0117, P0118 ECT SENSOR ].

DTC DETECTING CONDITION AND POSSIBLE CAUSE

DTC No.	Trouble diagnosis name	DTC detecting condition	Possible cause
P0125 0125	Insufficient engine coolant temperature for closed loop fuel control	Voltage sent to ECM from the sensor is not practical, even when some time has passed after starting the engine. Engine coolant temperature is insufficient for closed loop fuel control.	Harness or connectors (High resistance in the circuit) Engine coolant temperature sensor Thermostat