Once i put it in reverse it gives me warning to check my rear park aid but i don’t have sensor holes in the rear Bumber ?! I have Ford expedition 2010

 

Are you the original owner? If not, maybe your rear bumper was replaced at some point without the sensor holes for some reason. Just a guess.

I get that error message in my F350, but that’s because my sensors have all died.

 

Re: no i’m not the original owner but i doubt it that it was replaced without sensors
plus I’ve done some research about the problem that there could be radar sensors and when you have radar sensor you won’t have sensors in the rear bumber but i need someone to confirm

 

Here's a video on it. See if you have the harness back there with the sensors missing.

 

I don’t have the harness
check this i think same thing i have but his “sensors” work mine doesn’t

 

Don't see the link.

 

https://www.ford-trucks.com/forums/1...id-sensor.html

 

According to your link, you should have some sort of wiring going into the bumper somewhere behind it.