Engine Coolant Temperature Sensor

Check resistance between engine coolant temperature sensor terminals 1 and 2 as shown in the figure.

Fig 1: Checking Resistance Between Engine Coolant Temperature Sensor Terminals 1 & 2

Courtesy of NISSAN MOTOR CO., U.S.A.

< Reference data >

ENGINE COOLANT TEMPERATURE SENSOR TERMINALS REFERENCE DATA

Engine coolant temperature °C (°F)	Resistance kΩ
20 (68)	2.1 - 2.9
50 (122)	0.68 - 1.00
90 (194)	0.236 - 0.260

If NG, replace engine coolant temperature sensor.

Fig 2: DTC P0125 ECT Sensor - Temperature/Resistance Graph
Courtesy of NISSAN MOTOR CO., U.S.A.