Front Heated Oxygen Sensor Heater
Component InspectionFRONT HEATED OXYGEN SENSOR HEATER
Check resistance between terminals 3 and 1.
Resistance: 2.3 - 4.3 Ohms at 25°C (77°F)
Check continuity between terminals 2 and 1, 3 and 2.
Continuity should not exist. If NG, replace the front heated oxygen sensor.
CAUTION: Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.