Intake air temp sensor bank one sensor two is reading -40. But I can’t find the location of the sensor.

 

Pretty sure there aren't individual intake air temp sensors. In fact pretty sure there aren't any intake air sensors at all on the NA engine.

 

Is it not built into one of the maf sensors?

 

What tool says exactly that?

As well as the IAT near/in the MAF there's one to monitor the SC charge temp, but I know it as IAT2. Maybe the same one?

What code are you seeing?

BTW would help to add your car details...

 

2015 XF 2.0 turbo
after I replaced both fuel pumps, I tried to reset adaptives but scanner said iat was -40, and wouldn’t allow me to. Checked data and IAT 1 (in MAF) was reading properly. 68, and -40 when unplugged. Car came in no start. Low fuel pressure and low volume . Did primary pump first car ran , but not as expected. Scanner data showed 400 psi at idle. Then replaced high pressure pump. Now I get 420 at idle.

 

Yes, apparently they are.