Splitting lambda sensor signall
Turbo Mini Forums

Hey everyone,
Just having a wonder, is it possible to split the output of a lambda sensor, so that a lambda gauge and ecu could both read the same reading?
The ecu in question doesn't have any outputs and I don't fancy welding on an extra lambda bung and buying another sensor if I could just split the signal.
It makes sense in my head as the sensor just produces a voltage which would be the same of ecu and guage are wired in parallel.
The current would be lowered, will that be an issue?

Any other thoughts?

first question....wideband or narrow band,

im gonna guess based on your question its a narrow band
in which case the information it would give is next to useless
but it essentially kicks out a 0-1v signal and an ebay type afr gauge can be wired into the signal wire with no issues

the wideband will need a controller of some sort and in most cases will be a gauge anyway... it will likely have an output for the ecu

Yes i moved to the darkside

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My bad, I assumed that the stock ecu would be using a wideband to adjust far but a little digging showed that it just uses a narrowband and only adjusts at low throttle position.
So yeah not that useful for a gauge!
Looks like I will go with a stand alone wideband instead.

If you get a standalone wideband controller gauge , they can normally output a 0-1V signal to emulate a narrowband sensor. Feed that into your ECU and you only need to run the one sensor.