The lambda sensor isn't working on my car 94 uk turbo so i investigated today.
It has a single wire sensor, bodged on going to the 4 pin plug somehow!
Not surprising it doesn't work!
There are three wires coming out of the plug into the loom, so i presume it should be a three wire sensor, is that correct?

One of the previous owners was a bit of an animal by the looks of it!

Thanks,
Mark.