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Lambda sensor wiring
Johneturbo - 21/6/11 at 05:54 PM

I've got a wideband lambda sensor as part of my power commander V autotune set up
but the wiring is a little bit on the short side from the sensor.. would it be ok to cut/extend the wires or would it effect the readings?

here's a piccy of the sensor the multiplug plugs into a longer loom but it would mean having the big plug outside the car :/

Lambda sensor
Lambda sensor

lambda sensor
lambda sensor


[Edited on 21/6/11 by Johneturbo]


mark chandler - 21/6/11 at 07:20 PM

The plug on the sensor may be more than it seems, they tend to have a sensor built into the plug, I guess it measures fresh air so you really need to piece out on the loom side, not the sensor side.

Regards Mark


Johneturbo - 22/6/11 at 09:18 AM

Hey Mark, i've still got your Cortina hubs if you ever need/want them

What i wanted to do is cut the wires between the sensor and that miltiplug and add a section about 12" just so it can be extended it will be as it is but longer with a couple joints for the extra wire length

or would that mess up the readings/calibration


Strontium Dog - 22/6/11 at 10:43 AM

The plug on a normal wideband probe does not contain a sensor but has a calibration resister in it.

I have extended by a small length the looms on a couple of probes I have fitted and never had a problem. To check it or when calibrating it if needed, you can do a free air test. Just google "lambda free air test" for lots of info on how to do this. Unfortunately I have not used a power commander so I'm not familiar with the software!

Hope that helps, Si.


Johneturbo - 22/6/11 at 10:57 AM

Ok Si thanks
i've done a bit of googling and looks like you can buy extentions that plug in, so cutting the loom should have the same effect i guess, i've also emailed a company that sells them for afr gauges to see what they think

not had much luck speaking to anyone at dynojet :/