P0031 where is front O2 sensor on jdm blob
 

Hi all, I've got P0031 code which is heater control circuit low ( bank 1 sensor 1 ) from what I know is that the first lambda sensor shot, so I bought new one Denso 22641AA042, but apparently the plug is different and it don't fit ( sensor on DP just behind turbo ) does sti uk and jdm has sensors in different locations as when I searched on the SN I found that some has on the headers just before UP which can be seen when you take off drivers side front wheel, mine has two sensors on DP one on the top and one on the bottom.
Also when I check resistance on heater circuit two black wires it showing 1 Ohm so AFAIK it's ok? although when checked resistance on the other sensor at the bottom of the DP it was showing 4.5 Ohm which I think is shot? but P0031 relates to front sensor to the rear one?
and lastly does anyone know what part number is for the correct lambda sensors for JDM blob? Thanks and any help would be much appreciated.

Here are the pics of the plugs
New one which I bought and it don't fit

https://cimg8.ibsrv.net/gimg/www.sco...191e938db.jpeg

Front lambda on the top of DP

https://cimg7.ibsrv.net/gimg/www.sco...ea5ac9bca.jpeg

Rear lambda on the bottom of the DP

https://cimg0.ibsrv.net/gimg/www.sco...48bf19d52.jpeg

Had the same with mine, you need the twinscroll one if you've got the jdm sti! http://www.importcarparts.co.uk/part...y=&searchPart=

As above you need the more expensive one i had to buy one

See if matty the breaker has one off a jdm

Thanks guys I'll ask Matty, but do you think that it may be something else as when I checked resistance it seems to be ok. Also is that front sensor on the top of DP?

Yes on downpipe might still be sensor could be getting lazy

Right so if I need to replace it anyway is it not better to get wideband lambda instead of oem one? I believe it would work out cheaper to have wideband lambda with gauge than just oem.