Heated Oxygen Sensor 1 Heater

WARNING: This page is about a different variant/trim than selected.

Check resistance between HO2S1 terminals as follows.

RESISTANCE SPECIFICATION

Terminal No.	Resistance
1 and 3	3.3 - 4.0 Ω at 25°C (77°F)
2 and 1, 3	infin Ω (Continuity should not exist)

If NG, replace heated oxygen sensor 1.
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.
- 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.
  
  Fig 1: Checking Resistance Between HO2S1 Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.