Question about o2 sensors on ge-t

[phil.g.]

Hi everyone,

Can anyone tell me what the sensor is on the top of the downpipe, I’ve searched for o2 sensor and none of them are the same as this single wire sensor,

any help would be appreciated,

thanks,

phil.

[mattdavies]

Maybe its for an aftermarket gauge ? 

It looks like the lower one is the one for air/fuel. Whats the setup on the car ? Does it still have the Stock ECU ? 

[phil.g.]

Thanks Mattdavies,

The setup is:-

single turbo conversion 

Plug on coil pack

gte Ecu with G-reddy performance piggyback ecu

standard injectors

hks boost controller

there is a fuel/air ratio meter that is working, but I can’t follow the wire from the top sensor to find out where it goes.

the Ecu was changed recently as I went plug on coils, I needed the gte Ecu to run them, but that sensor has always been there,

im only asking because I have an o2 error sensor but i got a new one a few months to try and get rid of the error code, it never worked

Edited February 20 by phil.g. (see edit history)