what is a heated oxygen sensor?
#2
the engine uses 2 kinds of oxygen sensors, non-heated and heated. I wouldn't call it special as all engine makers, not just Nissan, use both kinds. The heated oxygen sensor is after the catalyst. The non-heated is used before the catalyst.
The O2 sensor that is before the catalyst is called the upstream sensor while the O2 sensor after the catalyst is called the downstream sensor.
The O2 sensor that is before the catalyst is called the upstream sensor while the O2 sensor after the catalyst is called the downstream sensor.
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