Prius L4-1.5L (1NZ-FXE) (Hybrid) (2003)
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Oxygen Sensor: Testing and Inspection
INSPECTION
1. INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSOR (Bank1 Sensor1)
a. Disconnect the oxygen sensor connector.
b. Using an ohmmeter, measure the resistance between the terminals +B and HT.
Resistance: 11 - 16 Ohm at 20 °C (68 °F)
If the resistance is not as specified, replace the sensor.
Torque: 44 N.m (450 kgf.cm, 31 ft.lbf)
c. Reconnect the oxygen sensor connector.
2. INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSOR (Bank1, Sensor2)
a. Take out the floor carpet.
b. Disconnect the oxygen sensor connector.
c. Using an ohmmeter, measure the resistance between the terminals +B and HT.
Resistance: 11 - 16 Ohm at 20 °C (68 °F)
If the resistance is not as specified, replace the sensor.
Torque: 44 N.m (450 kgf.cm, 31 ft.lbf)
d. Reconnect the oxygen sensor connector.
e. Resistance the floor carpet.