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Torque » Torque OBD ECU Scanner » Torque Discussion / Ideas » O2 sensor (wideband) PID's formula

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Author Topic: O2 sensor (wideband) PID's formula
Posts: 49
Post O2 sensor (wideband) PID's formula
on: October 12, 2021 (GMT)

Hi everyone,

I’m looking for informations about O2 sensor,
I try to get Air Fuel Ratio (AFR) and Lambda measured.

My vehicule is a 08′ SAAB 93 TTID (gazole).
My O2 sensor is a bosch LSU 4.9.

Thanks to cintakc, I know that the infos from the sensor are on PID AA011E,
and the PID sent reponses from R3 to R9.
It seems that :
R4 is the percent of heating (preheated sensor) with formula : R4x100/255
R5 is the sensor temperature (600-700°C) with formula : R5*4-40
R7 is the sensor voltage with the formula R7x5/255

I’m not sure about those formulas… But results are pretty understandable…
But I don’t know about other responses…

Any ideas ?

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