Wideband afr gauge
 

Is it possible to tap into the factory wideband oxygen sensor and connect a physical gauge to view afrs? I know you can see the afrs via obd but I'd like a physical gauge.

Thanks.

Sent from my SM-G991W using Tapatalk

the factory primary sensor is mandatory, so if you want a new wideband sensor you will connect it instead of the second factory almabda that you can remove and disable on tune

Thanks for your response. I'm wondering if there is a way to continue using the factory wideband but just wire in a display for it so I can see the afrs.

Sent from my SM-G991W using Tapatalk

i have the AEM wideband sensor kit, you plug the sensor in the place of the second oem a/f sensor, you disable it in the tune and the relative corrections (A/F#3 corrections in the tune) and i put his gauge inside the left air vent inside the cabin, so you can see the real AFR all the time

An extra step would be connect the output wire from the gauge to an input into the ecu (for example the black socket on which the second a/f sensor was connected to) so you can rescale the oem primary sensor to the new wideband sensor, so the AFRs match, both in the tune and in your gauge

AEM Wideband + Gauge kit

Like this?



https://www.p3cars.com/subaru/p3-v3-...uge-2012-2020/

Similar, this one still uses obd. I'm looking for one where I can read directly from the sensor itself. Not sure if it's possible. Thanks.

Sent from my SM-G991W using Tapatalk

Not unless you add a second wideband as I told you before
Or just take it from obd like others said, primary lambda is just a passive sensor, so you would need a special calibrated driver just to be able to have the reading from it available for a gauge
Instead, the ecu drives the primary lambda, so what you get from obd is reliable and you could use an obd gauge

but if you want a gauge separated from the ecu then you only can add a wideband kit as the one from AEM I linked to you

Physically connecting to the stock AFR sensor to run a physical afr giage is likely to cause issues as the second connection is likely to cause voltage or current changes and effect the readings from the stock afr sensor which is used by ecu.


Also the guage you connect would need to be mapped to the stock afr sensor calibration curve so it reads correctly.


You moght as well just ise the OBD reading of AFR provided by the ECU to monitor afr if your using stock afr wideband. You will need to ensure the stock afr wideband has been recalibrated in tune to read lower than 12.17 afr which is stock calibration limit, this sensor can read down to about 10 afr reliably if recalibrated in tune.


Once the stock sensor is recalibrated in tune that wideband signal can then be used by ecu for fuel correction and reading all the time using ecutek closed loop fuel control



Then its just a matter of using someting like torque app or the ecutek blutooth app or a P3 cars guage or luffi guage https://m.facebook.com/lufi.au/ to display the afr reading from the stock afr sensor

Thanks for your response! I'm currently using the rescaled stock o2 sensor, used it to tune my turbo kit, runs great.