Frontier 2WD V6-3.3L (VG33E) (2003)
Oxygen Sensor: Testing and Inspection
Component Inspection
HEATED OXYGEN SENSOR 1 HEATER
1. Check resistance between HO2S1 terminals 3 and 1.
Resistance : 2.3 - 4.3 Ohm at 25 °C (77 °F)
2. Check continuity between HO2S1 terminals 2 and 1, 3 and 2.
Continuity should not exist.
3. If NG, replace heated oxygen sensor 1.
CAUTION:
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Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) on to a hard surface such as a concrete
floor; use a new one.
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Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and
approved anti-seize lubricant.
HEATED OXYGEN SENSOR 2 HEATER
Check the following
1. Check resistance between HO2S2 terminals 2 and 3.
Resistance : 2.3 - 4.3 Ohm at 25 °C (77 °F)