02 Sensors?

Question

What's the difference between wide band and narrow band sensors. I know what a 02 sensor is. just explane the wide and narrow part of it.

Answer 1

Wide band sensors have wide bands.

On the other hand.

Narrow band sensors have narrow bands.

Answer 2

The wide band o2 sensor, the voltage varies smoothly with the O2 level.

The narrow band O2 sensor, the voltage swing from low to high as the O2 level goes from below 14.7 to above it.  The O2 sensor does NOT really know HOW much below until the computer enriches the mixture and swing PAST the 14.7 ratio.

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So on a wide band O2 sensor, the computer knows EXACTLY what fuel to air ratio is at any time

On a narrow band O2 sensor, the signal is

Too low, Too low,

Too high, Too high, Too high,

Too low, Too low,

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the computer ONLY know that the mixture was perfect when it swing from too low to to high and back.

Good Luck...

P.S. 14.7 to 1 is perfect mixture (stoichiometry).