Key Not Detected, assuming short

2010 w/ 117k miles. Light comes on while car is running, not moving, in D or P, and a door closes from someone getting in/out. Have checked to ensure gate fully closed, replaced FOB battery. The 12V adapter in cig outlet is unchanged/unmoved for cell charging with same phone, only a cord was replaced. Assuming there is a short or loose wire because it happens with door closing. 12V battery is about a year old and no other electrical issues. Keys stay on flat part of accessory/storage area while driving.

Is there any way to narrow this down to FOB vs car better before hitting the dealership?

 

Thanks! Will look into this.
Def no major damage. I'm the 2nd owner - I did check the carfax at dealer. Might have been minor accident + repairs....

 

It happens with front and rear doors after it starts. I wasn't clear on the initial description.
Today it was fine at first and then started doing it again. Maybe the FOB was sitting slightly closer at first. Planning to go to a locksmith tomorrow to see if they can help troubleshoot.

 

Additional info after I stopped by locksmith...FOB battery voltage is good. The key not detected did not come on while I was there. He checked the FOB for what they typically can and said it is fine.
The only thought he had was that the physical location of the FOB might be making a difference:
Further forward on the flat area next to accessory panel, the signal may be getting blocked by the center line arm just enough to trigger the light/alarm.
For now, I am trying to relocate the FOB and see how that goes. Today, it seems to have worked by moving the FOB to the rear of the flat area.

 

No mods. What i mean is the flat deck under the console with the gear shift - that is where I keep the keys (stock photo).