O2 sensors in golf gt

[SGGT]

Are these sensors wideband or narrow band on the golf gt 1.4TSI 170HP?


I saw 4 wires coming out of it. White, white, balck and grey.
Which one is the signal wire?

[bazzle]

Black is sensor, 2 white are heater, grey is prob common

Bazzle

[SGGT]

Ya, after reading up, I was gussing that the black one is the signal wire.
But it is wideband (0-5V output) or narrowband (0-1V) output?

[POLARBEAR666]

Interested in this also... are u thinking of whacking an A/F ratio gauge on it?

[Oneofthegreats]

Just about every factory fitted OEM oxy sensor I know of is narrowband.

Although some car's do have a wideband before the cat. convertor & a narrowband after it.

Why. Cause the tune is just about spot on & there's only a very small amount of fluctuation between rich & lean that the ECU has to contend with. Even if there's an air leak eg. split intake pipe, it will normally fault "oxy. sensor reading too lean"

Where as with a wideband, you can tune all the way too stupidly rich & extremely lean.

Narrowband are also a fair bit cheaper & last a hell of alot longer the wideband in my experience.

[SGGT]

Interested in this also... are u thinking of whacking an A/F ratio gauge on it?

Yes, you are right. I have a narrowband A/F gauge sitting there in the middle of a 3 gauge pod. Thinking of DIY the connection.

[POLARBEAR666]

An a/f ratio is only useful if you are having minor driveability issues and want to check whether its the oxy sensor.

I can do this via my Scanguage 2 as it shows readings for both oxygen sensors in real time simultaneously.

I have oxy 1 and oxy 2 setup.

So i can see before and after cat readings and see if they are what htey normally are.

To be honest, by the time a lean out event happens its too late to stop it. You will hear a bang and damage is done. Gauges are useful for small faults but catastrophic failures wont be stopped.

[SGGT]

I understand. I would like to hook it up anyway since I already have the gauge sitting there. Just need to connect the signal wire to the correct O2 sensor wire, that's all. So gathering some info and feedback.

[POLARBEAR666]

Be very interested to see your setup once its installed and get your review of the readout.