Nissan Sentra B18 (2020-2025) Service Manual: A/f Sensor 1 Heater
Component Inspection
Component Inspection
-
CHECK AIR FUEL RATIO (A/F) SENSOR 1 HEATER
-
Turn ignition switch OFF.
-
Disconnect air fuel ratio (A/F) sensor 1 harness connector.
-
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.
-
-
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
-
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