Unfortunately I’m not home now and I wont be for next two weeks so I can’t send you picture of it but let me try to explain.
Under bonnet, in the middle of the engine bay, on top of the engine; You will find it, looks like a small square piece of black plastic. There is one connector going into it, as well as small tiny plastic pipe from the left side.
In my case, plastic bit connecting pipe with sensor was broken.
They’ve told me that Speed sensor, and another guy told me that sensor is actually measuring pressure from turbine; Don’t know is that right or not…but soon as I connected pipe back to sensor…car came alive
Not sure if this is gonna help…but good luck