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Both upstream o2 sensors at 2.0v+?

The pre-car "O2" sensors are actually Air/Fuel Ratio sensors (aka wide band) and have a different output voltage that ranges from 0 to just over 4 volts. The post-cat O2

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		Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain
Both upstream o2 sensors at 2.0v+?

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10-30-2022, 09:17 AM	#2 (permalink)
SonicVQ Base Member Join Date: Jan 2016 Location: Ontario Posts: 230 Drives: G37 Sport Rep Power: 6721	The pre-car "O2" sensors are actually Air/Fuel Ratio sensors (aka wide band) and have a different output voltage that ranges from 0 to just over 4 volts. The post-cat O2 sensors are the older/cheaper narrow band and output a voltage between 0 and 1.0v. From the screen shot, your air fuel ratio is: 1/Equiv ratio * 14.68 which calculates to 14.70... right where it should be for idle. SwedeZ likes this.

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