Identifing which Parking sensor failed?

Hi All,
I've got an FF which started giving me a parking sensor failure. Problem is when 1 sensor fails the entire system shuts down. I was hoping anyone knows a trick to find which is the specific sensor that may have failed to not have to go to a dealer to diagnose?

I tried hooking up my Foxwell but it shows all the same readings on all sensors so that didn't work.
I've also read you can actually hear the sensors working, but I can't tell on any of them, not sure if I'm just not listening for the right thing.

Appreciate any suggestions, thanks!

 

Ahh, excellent thought! Will check it as soon as I can.

 

No Joy
Looks like all the parking sensors get shut off when the error is detected.
If I leave Park&Go turned on, the error pops up and the sensors get shut off immediately on startup.
If I turn off Park&Go the sensors are not active on startup and I don't get an error, but then when I go into reverse and the sensors are activated the error pops up and shuts everything down again.
Don't see any way around it other than removing the bumper and going through them one by one, aaahhhh!

 

For anyone trying to check this, I was actually able to find the specific parking sensor that failed after all using a Foxwell scanner, but only after using the specific Ferrari software to do so. It will tell you which specific sensor failed. Otherwise the generic OBD-ll software will only give you a generic error message.