Can someone confirm what the x2 senders are that go into the standard downpipe?

x1 is lambda probe I am certain.. the other I have heard it could be a lambda heat sender? or EGT .

I simply want to confirm what this sender does - it is smaller in diameter to the lambda.

Help!

 

I have been told the second sender is a temp probe that detects if the cats are overheating. As mine is decatted fully have got rid of it.

 

Cheers, the same answer I've got from a few phone calls.

I have the BPM full decat system - swap out of the lamda next. Fingers crossed.

Cheers