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Nissan Sentra B18 (2020-2025) Service Manual: A/f Sensor 1 Heater

Component Inspection

Component Inspection

  1. CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER

    1. Turn ignition switch OFF.

    2. Disconnect air fuel ratio (A/F) sensor 1 harness connector.

    3. Check resistance between A/F sensor 1 terminals as per the following.

      A/F sensor 1

      Condition

      Resistance

      +

      −

      Terminal

      3

      4

      Temperature

      25°C (77°F)

      1.80 – 2.44 Ω

      1

      Not existed

      2

      4

      1

      2

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    GO TO 2.

  2. REPLACE A/F SENSOR 1

    Replace A/F sensor 1. Refer to Exploded View.

    CAUTION:

    • Discard any A/F 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 A/F sensor, clean exhaust system threads.

    >>

    INSPECTION END

    Accelerator Pedal Position Sensor
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    Other materials:

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